Mutual Fund Calculator
Final fund value: —
What do you want to solve for?
Project the final fund value, or work backwards from a goal to the contribution, lump sum, return or holding period it needs.
Fees, loads, tax & inflation
Enter an initial investment or a regular contribution to begin.
- Money in$0
- Gains$0
Cost & value breakdown
Fund growth over time
How the fund value builds year by year against the money you have paid in, with its today's-money line when inflation is on.
Money in vs gains
How much of the final pot is your own contributions and how much the fund earned for you.
- Money in$0
- Gains$0
What fees cost you
The fund value you keep against the amount lost to loads and the expense-ratio drag.
- Fund value kept$0
- Lost to fees$0
Load fee breakdown
Front-end load, back-end load and redemption fee side by side — redemption charges are zero on a full-term hold.
- Front-end load$0
- Back-end load$0
- Redemption fee$0
Reinvest vs take as cash
Net proceeds when distributions are reinvested (DRIP) versus taken as cash.
- Reinvested (DRIP)$0
- Taken as cash$0
Inflation impact
What the final proceeds are really worth once rising prices are stripped out.
- Real value kept$0
- Purchasing power lost$0
Sensitivity to the return assumption
How the final fund value swings as the assumed return moves a couple of points either way — read the central figure as a midpoint, not a promise.
- -2.0%$0
- -1.0%$0
- 0.0%$0
- 1.0%$0
- 2.0%$0
Step by step
From the money you pay in to the net proceeds you walk away with.
- Initial investment$0
- Contributions added$0
- Total invested$0
- Capital that bought shares (after front load)$0
- Net gain$0
- Final fund value$0
- Net proceeds$0
Year-by-year schedule
| Year | Invested | Gain | Fund value |
|---|---|---|---|
| 0 | $0 | $0 | $0 |
Fund value is shown gross of redemption charges and tax, which apply only when you sell.
Fee breakdown
| Fee | Amount |
|---|---|
| Front-end load | $0 |
| Expense ratio drag | $0 |
| Advisory fee drag | $0 |
| Back-end load | $0 |
| Redemption fee | $0 |
| Total fees paid | $0 |
Inflation-adjusted value
| Item | Value |
|---|---|
| Net proceeds | $0 |
| Inflation | 0.0% |
| Holding period | 0 yrs |
| Real value (today's money) | $0 |
| Purchasing power lost | $0 |
| Real annual return | 0.00% |
Return sensitivity
| Return | Value |
|---|---|
| -2.0% | $0 (+0.0%) |
| -1.0% | $0 (+0.0%) |
| 0.0% | $0 |
| 1.0% | $0 (+0.0%) |
| 2.0% | $0 (+0.0%) |
Inputs & results
| Item | Value |
|---|---|
| Initial investment | $0 |
| Contribution | $0 /month |
| Expected annual return | 0.00% |
| Expense ratio | 0.00% |
| Holding period | 0 yrs |
| Final fund value | $0 |
| Net proceeds | $0 |
| Net gain | $0 |
| Annualized return | 0.00% |
| Growth multiple | 0.00× |
The formula
The fund value is your loaded capital compounded at the return net of fund costs, with distributions split out and added back when reinvested.
FV = P·(1 − L_f)·(1 + net)^nwhere:
- FV
- the fund value at the end of the horizon
- P
- each amount paid in (lump sum or contribution)
- L_f
- the front-end load taken from every purchase
- g
- the gross expected annual return
- ER
- the expense ratio (plus any advisory fee)
- d
- the dividend yield split out of the return
Net return = (1 + gross)(1 − expense ratio)(1 − advisory) − 1, applied every month.
Back-end loads and redemption fees apply only if you redeem inside their window; otherwise they are zero.
Reinvested dividends buy load-free shares, so the gross fund value compounds at the full net return.
A worked example
Change any input and this sentence updates with your own numbers, computed by the same engine that draws the charts.
Your scenario
Investing $0 for 0 years at 0.00% (with a 0.00% expense ratio) grows to about $0 — roughly 0.00× your starting amount.
Assumptions
- The expected return is a constant annual average; real funds vary year to year.
- The expense ratio and advisory fee are charged as a smooth annual drag on the whole balance.
- Reinvested distributions buy units free of any front-end load, are taxed as income in the year they are paid, and add to your cost basis.
- Dividend tax applies to every distribution in the year it is paid, reinvested or not, as the 1099-DIV reports it. Capital gains tax is charged once at redemption, on the value above your cost basis. Estimates only — not tax advice.
- Back-end loads and redemption fees apply only when you redeem inside their window.
- Real values discount the result by a constant inflation rate.
Methodology
The engine steps month by month, buying shares after any front-end load and compounding at the return net of fund costs.
Fees are multiplicative: the net return multiplies one minus the expense ratio by one minus the advisory fee, so a small percentage compounds into a large lifetime cost.
The return splits into price appreciation and a dividend yield; reinvested distributions compound, while cash distributions accrue outside the fund.
Capital gains tax is applied to the gain at the end, and income tax only to cash dividends, leaving the compounding path undisturbed.
Inflation is applied at the end as a deflator to express the result in today's money.
Key terms
- NAV
- Net asset value — the per-share price of the fund, which rises with appreciation and is reduced by the expense ratio.
- Expense ratio
- The fund's total annual running cost, taken from assets every year whether the fund rises or falls.
- Load
- A sales charge: front-end loads hit your purchase, back-end loads and redemption fees hit early redemptions.
- Automatic investment plan
- A fixed amount invested on a set schedule — monthly, quarterly or yearly.
- DRIP
- A dividend reinvestment plan that buys more shares with each distribution instead of paying cash.
- Annualized return
- The single yearly rate that takes your total money in to the final proceeds over the holding period.
- Real value
- The result restated in today's money so you can judge what it would actually buy.
- Fee drag
- The compounding cost of fees — the growth you forgo because skimmed money can no longer earn.
Know what this estimate is based on
- Jurisdiction
- No statute sets these results — they are return, fee and time-value arithmetic that holds in any market. Tools in this category that do turn on U.S. tax law or a contribution limit say so on their own page.
- Scope and limitations
- Scenario model, not a forecast. Returns, volatility, inflation, fees and taxes are assumptions you supply, and actual investment outcomes can be lower or negative. Past performance does not carry forward, and no allocation shown here is a recommendation.
- Source links checked
- Sep 19, 2026
Built and regression-tested by Smart Tools Lab. It has not been individually reviewed by a licensed financial, tax, or legal professional.
Primary sources
- Understanding fees and what they cost over timeU.S. Securities and Exchange Commission — Investor.gov
- Beginners' guide to asset allocation, diversification and rebalancingU.S. Securities and Exchange Commission
- Investor.gov's own calculators — cross-check a result hereU.S. Securities and Exchange Commission — Investor.gov
How to use
- 01
Start by choosing your goal from the solve-for selector. Leave it on the forward mode to project a final fund value, or switch it to back-solve for the monthly contribution, the opening lump sum, the annual return, the holding period, or the present value of a future fund balance.
- 02
Enter your starting lump sum and your recurring contribution, choose how often you add it, set the number of years you plan to stay invested, and type in the gross annual return you expect the fund to earn before costs.
- 03
Open the advanced panel to fine-tune the costs and assumptions: the front-end load, back-end load and redemption fee, the expense ratio and any separate advisory fee, the dividend yield with its reinvest-or-take-cash (DRIP) switch, capital-gains and income-tax rates, and an inflation rate.
- 04
Read the projected fund value next to its real, net-of-fee and after-tax counterparts, then work through the cost breakdown, the dividend table and the charts. Store each run as a named scenario, set several side by side, or grab a shareable link that loads these exact inputs again.
Formula
Net annual fund return = (1 + gross return) × (1 − expense ratio) × (1 − advisory fee) − 1. A front-end load reduces each purchase before units are bought. Reinvested distributions remain in the fund and compound; cash distributions leave the fund. Any applicable back-end or exit load and capital-gains tax are deducted at redemption.
Example
Invest $10,000 for 10 years at an 8% gross annual return with a 0.50% expense ratio, no advisory fee, loads, distributions or tax. The net annual return is (1.08 × 0.995) − 1 = 7.46%, producing about $20,534 at the end.
Definitions
- Expense ratio
- The fund's annual in-fund operating cost, deducted as an ongoing percentage of assets.
- Front-end load
- A sales charge taken from each purchase before the remaining cash buys fund units.
- Back-end load
- A redemption charge that may apply when the fund is sold within a specified holding window.
- NAV
- Net asset value: the per-unit value of the mutual fund's underlying holdings.
- Distribution
- Dividends or other fund income paid to the investor or reinvested into more units.
Good to know
What a mutual fund calculator projects
A mutual fund calculator exists to answer a question a plain growth formula cannot: once every layer of fund cost has taken its cut, what does a buy-and-hold plan actually leave you holding? Three familiar inputs begin the story. There is the lump sum you commit today, the recurring contribution (an automatic investment plan) you add on a monthly, quarterly, or yearly cadence, and the number of years you intend to stay invested. Around them sits the part most spreadsheets quietly skip, namely the cost stack. A front-end load can skim each purchase before a single share is bought. The expense ratio, which is the fund's all-in annual running cost, drags on the balance every year you hold it, and an optional advisory or wrap fee can sit on top of that. A portion of the return arrives as dividend distributions, which you either reinvest or pocket as cash. At the moment you sell, a back-end load (a contingent deferred sales charge) or a redemption fee may apply if you redeem too soon, while capital-gains tax can claim a slice of the profit. This tool layers all of those forces onto the growth path rather than pretending they do not exist, then reports both the gross fund value and the net proceeds you genuinely walk away with. It also runs the logic in reverse, so you can fix a target balance and discover the contribution, the starting sum, the return, or the horizon that would reach it. Treat the headline figure as a structured estimate of a steady assumed return, not a forecast of any particular market. The value of seeing the whole stack laid out is that it shifts your attention away from the gross number a brochure advertises and toward the after-cost result that lands in your account, which is the only figure you ever get to spend.
How the engine grows the money, month by month
Beneath the results the engine advances one month at a time, which keeps every annual checkpoint exact while letting a short part-month tail handle fractional years. The first thing it settles is the rate it will actually grow your money at. Fees here are multiplicative, not subtracted: the net annual fund return is calculated as (1 + gross) × (1 − expense ratio) × (1 − advisory fee) − 1. With a 10 percent gross return, a 1 percent expense ratio, and no advisory fee, that works out to 8.9 percent a year, a shade below the 9 percent a crude subtraction would imply, because each fee bites on the already-grown balance. The annual net rate is then converted into a monthly growth factor, the twelfth root of one plus the net rate, so that compounding twelve of them reproduces the yearly figure precisely. Each simulated month the running balance is multiplied by that factor; if a contribution falls due that month it is added once any front-end load has been removed; and the dividend slice is split out from the growth. Your initial lump sum is deposited at the start, while every contribution enters on its own cadence and then earns growth only across the months that remain, so what emerges is a steadily rising stream of deposits compounding on top of the seed capital. Because the projection is a deterministic function of its inputs, the same machinery powers the reverse solvers, since the model can be rearranged or searched to find whichever input you leave blank. The yearly and monthly tables beneath the chart are the literal output of this loop, not a smoothed approximation, which is why the numbers in them always reconcile with the headline. What the engine deliberately does not model is volatility. It assumes one steady return every period, so read it as a disciplined baseline rather than a simulation of a bumpy market.
Loads: front-end, back-end, and exit charges
A load is a sales charge, and a fund can impose up to three kinds, each biting at a different moment. The front-end load is the most visible. It is taken from every purchase the instant you buy, so a 5 percent front load on a $25,000 investment means only $23,750 ever reaches the fund and starts compounding, while the missing $1,250 is gone before your first day. Because it applies to each purchase, a front load also skims every recurring contribution, not just the opening lump sum. The back-end load, more formally a contingent deferred sales charge or CDSC, works the other way around. There is no charge to get in, but if you redeem within a set window, often several years long, a percentage of the sum you committed is withheld on the way out. One detail matters here: a CDSC is figured on the gross amount you originally invested, not on the smaller post-load total that actually bought shares. On a $25,000 purchase, a 1 percent charge is therefore $250, taken against the full $25,000 rather than the $23,750 left after a front-end load. That window is the whole point. A 1 percent CDSC tied to a five-year window costs you nothing if you hold for the full five years, yet redeem after three and it bites, because three falls inside five. The redemption fee is a close relative, charged on the redemption value rather than the principal, and likewise gated by its own, usually shorter, window. The crucial consequence for a patient investor is that both redemption charges are zero on a normal full-term, buy-and-hold plan; they exist to penalize early exits, and a hold that clears every window simply never meets them. This is why the calculator reports a single load fee impact figure that sums the front-end load, back-end load, and redemption fee in dollars. It lets you see, before committing, exactly how much the share class you are weighing would cost in sales charges under both an early-exit scenario and a hold-to-term one. Where you have the choice, a genuinely no-load fund avoids this entire category of cost.
The expense ratio and advisory fee compound against you
The expense ratio is the fund's total annual running cost, bundling its management fee, administration, and other operating charges into one percentage that is deducted continuously from assets. You never see a bill, because it is already reflected in the published value. An advisory or wrap fee, when you use an adviser or a managed platform, sits additively on top, which is why the engine multiplies both into the net rate. The reason a 1 percent expense ratio costs far more than it sounds is that the fund deducts it annually from a balance that is busy compounding, and whatever it strips out is gone for good and can never compound for you again. On a plan that puts $10,000 up front and $500 a month for 15 years at a 10 percent gross return, that 1 percent ratio costs roughly $23,260 over the full horizon. Notice how far that overshoots 1 percent of anything you contributed. You put in $100,000, yet the drag exceeds a fifth of that, because each year's skim also forfeits all the future growth those dollars would have produced. The calculator names this the expense ratio drag, and it is deliberately measured as the difference between the fund value with the fee and the value the same plan would have reached with the fee switched off. That is the true lifetime cost, not the cosmetic annual percentage. Lengthen the horizon or raise the balance and the drag grows faster than the contributions do, which is exactly why low-cost index funds hold such a structural advantage over expensive active ones: a one-point difference in ongoing cost can quietly consume a sizable share of a multi-decade result while promising nothing extra in return. When you weigh two funds, compare them on net-of-fee outcomes, and treat the expense ratio not as a footnote but as the relentless annual headwind it genuinely is.
Dividends: reinvest or take the cash
A mutual fund's total return arrives in two forms: appreciation in the net asset value of its shares, and distributions, which are the dividends and interest the underlying holdings pay out. This calculator treats the dividend yield as a slice carved out of the total return rather than something bolted on top, and the split is multiplicative, so the headline growth is never double-counted. What happens to that slice depends on a single toggle. Under DRIP, short for dividend reinvestment, each distribution buys additional shares, and crucially those shares are purchased load-free, so the front-end charge never touches them. The arithmetic effect is elegant. Reinvesting hands the dividend straight back into the compounding balance, so the gross fund value grows at the full net rate exactly as if every cent of return had been price appreciation. Put differently, when you reinvest, the dividend yield becomes invisible in the final fund value: whether the fund pays 1.5 percent in dividends or nothing at all, a reinvested total return of the same size lands on the identical balance. On that 15-year plan those reinvested distributions add up to about $20,620, money already embedded inside the $217,734 result rather than sitting beside it. Switch the toggle to payout and the picture changes shape. Now the net asset value grows on price appreciation alone, and each distribution leaves the fund as cash that accumulates outside it, optionally taxed as income in the year you receive it. The same gross return therefore produces a lower fund value plus a separate cash pile, instead of one larger reinvested balance. Neither path is automatically superior. Reinvesting maximizes long-run compounding, while taking the cash suits an investor who needs income now. The calculator simply makes the trade explicit, so you can read the fund value and the dividend stream as the two distinct results they truly are.
Taxes, the DRIP assumption, and real value
Because tax treatment can swing an outcome substantially, the calculator is explicit about the simplifications it makes, and you should read them as estimates rather than tax advice. There are three moving parts. Capital-gains tax is charged once, on the fund's gain at redemption, mirroring the way a taxable gain typically falls due only when you actually sell. Dividends follow the toggle: when you take them as cash, each one is taxed as income in the year you receive it, the way a distribution normally is. When you reinvest under DRIP, the model treats those reinvested dividends as untaxed until you finally redeem. That is a deliberate tax-deferred-wrapper assumption, which suits a retirement account or similar shelter but would understate the bill in an ordinary taxable account, where reinvested distributions are usually taxable as they are paid. Knowing which assumption fits your own account is the difference between a useful estimate and a misleading one. The second force on what you keep is inflation, which never alters the nominal balance yet quietly eats away at what those dollars can buy. The tool reports a real, today's-money value by discounting the net proceeds at your assumed inflation rate. On that same plan, the $217,734 you would hold after 15 years is worth about $150,338 in current purchasing power once 2.5 percent annual inflation is stripped out, still a substantial gain over the $100,000 you contributed, but a markedly more sober figure than the headline. The lesson is to measure a plan by its inflation-adjusted, after-tax result rather than its gross nominal total: a return that merely keeps pace with rising prices is, in spending terms, treading water. The real-value line and the tax outputs exist precisely so the impressive top number never lulls you into forgetting the two quiet forces standing between it and the money you can genuinely use.
Six solve-for modes: planning backward from a goal
Forward projection is only half of what the calculator does. The more useful half, for anyone planning toward a target, is running the relationship backward, and there are six modes in all. The default, final fund value, projects forward from everything you enter. The other five fix a goal and solve for one missing input. Required contribution finds the recurring deposit your goal demands: keep the $10,000 starting sum and aim for $250,000 in 15 years, and it tells you that about $589 a month gets you there. Required initial investment solves for the lump sum instead, so chasing the same $250,000 while keeping the $500 monthly contribution, you would need roughly $18,981 up front. Required annual return backs out the gross return a plan implicitly assumes, which is a sharp reality check: if the rate it returns is higher than any fund reliably delivers, the goal is too aggressive for the contributions you set. Required holding period answers how much additional time would bridge a shortfall. Present value discounts a single future fund value back to today at the net rate, revealing what a future target is worth in present money, so $250,000 due in 15 years is worth about $69,586 today on those assumptions. Every one of these back-solves lands on the identical projection, simply traveling toward it from the answer rather than from the inputs, and each refuses to flatter you: if a goal stays out of reach even when an input is stretched to the furthest value that still makes any sense, the tool reports the shortfall outright instead of handing back a comforting number it cannot stand behind. This is what turns the tool from a scorekeeper into a planning instrument. You can test a target against your actual budget, uncover the return a goal quietly requires, or learn how much sooner you would need to start, then adjust the goal, the horizon, or the contribution until the plan rests on numbers a real fund can supply.
Two return figures, and the growth multiple
Two different return figures appear in the results, and reading them as if they were the same number is one of the easiest mistakes to make. The first is the net annual fund return: the gross return minus the ongoing fee drag, which is 8.9 percent on that 15-year plan once the 1 percent expense ratio comes out of the 10 percent gross. This is the rate the fund itself earns each year on money that is already invested, the speed of the engine, independent of how much you fed it or when. The second is the overall annualized return on your plan, which on that same 15-year plan is only 5.32 percent. That gap is no contradiction; it reflects timing. Most of your $100,000 was not present from day one. It arrived $500 at a time across 15 years, so the average dollar was invested for much less than the full horizon. This overall figure measures the growth of your whole pot rather than any single dollar: it is the one annual rate that, applied across the 15 years, turns the full $100,000 you paid in into the $217,734 ending value. For a one-off lump sum with no further deposits the two figures would coincide; it is the steady drip of later contributions that pulls this pooled figure well below the fund's own return. Alongside both sits the growth multiple, the net proceeds divided by everything you put in, which on that plan is 2.18, meaning you end with $2.18 for every dollar contributed (your principal included, not just the gain). Use each figure for its proper purpose: the net annual return to judge the fund and compare it against alternatives, the overall annualized return to see how your whole pot actually grew given the timing of your contributions, and the multiple as an intuitive summary of how far your money traveled. Quoting the fund's 8.9 percent as though it were the return on your whole plan flatters the result; the 5.32 percent describes what your money in really did.
Sensitivity: why one projection is a midpoint
Of all the inputs you supply, the expected return is at once the hardest to pin down and the one the final figure leans on most heavily, so the tool sets aside a panel of its own to stress-test it. That sensitivity panel recomputes the final fund value across a band of nearby returns — two points under your assumption, one under, your own figure, then one and two over — and lays out just how widely the ending balance can swing as a result. Since each year's growth is applied as a compounding exponent, that movement is anything but gentle: a couple of percentage points on the assumed return can shift a long-horizon balance by a third or more, dwarfing the effect of nudging almost any other input. Seeing the spread laid out does two things. First, it inoculates you against false precision. A projection that reads as $217,734 to the dollar can feel authoritative, but the band reveals it for what it is, the midpoint of a range rather than a figure the market has promised to deliver. Second, it lets you judge how robust a plan is. If your goal is only reached at the optimistic edge of the band, the plan is fragile and depends on everything going right; should it still reach the target at the pessimistic edge, it is sturdy enough to absorb a disappointing decade. The honest way to use any return assumption is to treat the central result as one plausible outcome among many, and to scale your monthly savings so that even a below-average decade still leaves the goal within reach. Markets do not deliver the same number every year. They lurch, stall, and surge, and a steady-rate projection deliberately smooths all of that away. That smoothing is what makes the tool a clear planning baseline, but it is also why no single line on the chart should be mistaken for a guarantee. The band around it is where reality actually lives.
Putting it together: two scenarios and the pitfalls they expose
Start with a worked example. You commit $10,000 today, add $500 a month for 15 years, and assume a 10 percent gross return, a 1 percent expense ratio, a 1.5 percent dividend yield reinvested through DRIP, and 2.5 percent inflation. Your money in totals $100,000: the opening $10,000 plus 180 monthly contributions. The projection lands the gross fund value at $217,734, a net gain of $117,734 and a growth multiple of 2.18 times. The expense ratio drag accounts for about $23,260, and $20,620 of reinvested dividends already sits inside that balance. Strip out inflation and the real, today's-money value is roughly $150,338; the fund's own net return is 8.9 percent a year, yet the overall annualized return across your staggered contributions is 5.32 percent. Now contrast a fee-heavy early exit. Put $25,000 in as a lump sum, but the share class carries a 5 percent front-end load, so only $23,750 actually buys shares; it charges a 1.5 percent expense ratio plus a 0.5 percent advisory fee, and it imposes a 1 percent back-end load inside a five-year CDSC window plus a 1 percent redemption fee inside a one-year window. Redeem after just three years and the windows decide the outcome: the back-end load bites, costing $250 because three years remains inside the five-year window, while the redemption fee is zero because three years sits past its one-year window. Net proceeds come to $29,509, with the loads alone, the load fee impact, totaling $1,500. From these cases the common mistakes write themselves. Do not read the nominal balance as real spending power; do not wave away loads as trivial when a front charge alone can exceed a year of contributions; do not forget that the expense ratio compounds against you for the entire horizon; and do not treat any single return assumption as a promise the market has made.
Frequently asked questions
Can I model a one-off lump sum and a regular monthly investment at the same time?
Yes. The opening lump sum and the recurring contribution run together in the same projection: the lump sum compounds from day one, while each periodic deposit compounds only for the time left after it is paid in. Set the contribution to zero to model a pure lump-sum purchase, or drop the opening balance to nothing to model a plan funded purely through contributions. A plain example blends both, with $10,000 invested upfront and $500 added every month for 15 years.
What is the difference between the expense ratio and the sales loads?
The expense ratio is the fund's total internal running cost, deducted continuously from assets every year for as long as you hold it, so it quietly lowers your return whether the fund rises or falls. The loads are one-off sales charges levied on a transaction: a front-end load is taken when you buy, while the back-end load and redemption fee are taken when you sell. In short, the expense ratio is a recurring drag on the balance, and the loads are entry or exit tolls. A clean no-load index fund may carry no loads at all yet still has an expense ratio.
How do the front-end load, back-end load and redemption fee differ, and when do they bite?
A front-end load is skimmed off every purchase, so a 5% front-end load means only $23,750 of a $25,000 check actually buys shares. The back-end load (a contingent deferred sales charge) and the redemption fee are charged when you redeem, but only if you sell inside their stated windows, measured in years from purchase. Hold past the end of both windows and they fall to zero, which is why a normal full-term buy-and-hold pays no redemption load at all. In the early-redemption example, selling after 3 years triggers the 1% back-end load because 3 years is inside its 5-year window ($250), while the 1% redemption fee costs nothing because 3 years already sits beyond its 1-year window.
Why does a 1% expense ratio cost me far more than 1% of my money?
Because the 1% is charged every year on your whole balance, and the money it removes can never compound again. Each annual slice looks small, but skimming it year after year robs you of all the growth that money would otherwise have produced over the rest of the horizon, so the lifetime cost snowballs well beyond the headline rate. On a 15-year plan of $10,000 up front plus $500 a month at a 10% gross return, a 1% expense ratio builds up to an expense-ratio drag of about $23,260, far larger than 1% of any single year's balance. The longer you stay invested, the more lopsided that drag becomes.
What does the DRIP toggle do, and what counts as dividend income?
Part of a fund's total return is handed back as distributions, sized by the dividend yield. With DRIP (reinvest) switched on, those distributions automatically buy more shares at no sales charge, so they stay inside the fund and keep compounding. With payout switched on, the NAV grows on price appreciation alone and the distributions land outside the fund as cash, which is the dividend income you pocket along the way and which can be taxed as income as it arrives. The toggle therefore decides whether your dividends are reinvested for growth or collected as a running cash stream.
Why don't reinvested dividends change my final fund value?
Whether a slice of total return is labeled a dividend or left as price growth, reinvesting it puts the same money straight back to work in the fund. So under DRIP the fund compounds at the full net return no matter how that return is split between appreciation and distributions, and the dividend yield becomes invisible in the final fund value. The reinvested-dividends figure (about $20,620 on that 15-year plan) tells you how much of the ending balance arrived through distributions, but nudging the yield up or down while keeping total return fixed leaves the DRIP fund value unchanged. The split only starts to matter once you switch to payout, where distributions leave the fund instead of compounding within it.