Capital Gains Distribution Calculator
A fund notice that says your fund paid $2.75 per share sounds simple until you try to use the number. How much did you actually receive, how big is that next to what you have invested, and what will it cost in tax? This calculator starts from the notice itself: enter the shares you held and the per-share distribution, split into its short-term, long-term and return-of-capital parts, and you get the dollar totals, the distribution rate, and an estimated 2026 federal tax figure in one pass.
The tax estimate uses the real 2026 federal thresholds from IRS Revenue Procedure 2025-32: the long-term portion stacks on top of your other income at 0%, 15% or 20%, the short-term portion is taxed at ordinary rates, and the 3.8% net investment income tax is added where it applies. It is a planning estimate, not a tax return.
The tax section is an estimate for tax year 2026 using the federal thresholds in IRS Revenue Procedure 2025-32. Federal tax only: no state tax, no alternative minimum tax, no capital loss offsets. Return of capital is excluded because it reduces cost basis instead of counting as income.
Quick Answer
Key takeaways
- Funds announce distributions per share, so the dollar total is shares times per-share amount: 1,000 shares at $2.75 per share is $2,750.
- The split decides the tax. Short-term distributions are taxed as ordinary income, long-term distributions stack at 0%, 15% or 20% for 2026, and return of capital is not taxed at all when paid: it lowers your cost basis instead.
- Stacking is why two investors with the same distribution can owe very different tax. In the worked example the whole $2,000 long-term portion lands in the 0% band, so the estimated tax on $2,750 is $60.
- Buying a fund just before its distribution date can hand you a tax bill for gains you never enjoyed. The record date, covered below, is the date that decides who gets taxed.
- Quick Answer
- How to use the capital gains distribution calculator
- The formulas: distribution totals, rates and the tax stack
- Worked example: 1,000 shares, $2.75 per share, and a $60 tax estimate
- Where the per-share figures come from, and how each part is taxed
- What the tax estimate leaves out
- What competing calculators miss
- Frequently Asked Questions
- Add This Calculator to Your Website
- References
How to use the capital gains distribution calculator
Start with the fund notice or year-end statement, because it already splits the distribution for you. Enter the shares held on the record date, then the per-share amounts: short-term, long-term (capital gain), and any return of capital (some funds call it a nondividend distribution). Add the fund price per share (NAV) and the holding period in years; fractions such as 2.5 are accepted.
The last two inputs drive the tax estimate: filing status and taxable income before this distribution (your 2026 taxable income with the distribution left out). Press Calculate for the dollar totals, the two rates, and the estimated tax split into its three parts.
The formulas: distribution totals, rates and the tax stack
Every output is plain arithmetic. The tax side follows the IRS stacking order: ordinary income fills the bands first, then the short-term distribution, then the long-term distribution on top.
One footnote on the word annualized: this tool spreads the total evenly, the right way to compare distributions of different sizes and holding periods. It is not the compound annual growth rate (CAGR): a 5.50% total over 5 years compounds to about 1.08% per year. For the compounded view of a whole holding, the time-weighted return calculator covers performance measurement properly.
| Filing status (2026) | 0% band up to | 15% band up to | 20% above | NIIT threshold (MAGI) |
|---|---|---|---|---|
| Single | $49,450 | $545,500 | $545,500 | $200,000 |
| Married filing jointly | $98,900 | $613,700 | $613,700 | $250,000 |
| Head of household | $66,200 | $579,600 | $579,600 | $200,000 |
| Married filing separately | $49,450 | $306,850 | $306,850 | $125,000 |
Those are the maximum zero-rate and 15%-rate amounts in Revenue Procedure 2025-32, applied to taxable income including the gain, which is why stacking order matters. According to IRS Topic No. 409 on capital gains and losses, most net capital gain is taxed at no more than 15%. The NIIT thresholds come from IRS Topic No. 559 on the net investment income tax and are fixed by statute: they have not moved since 2013.
Worked example: 1,000 shares, $2.75 per share, and a $60 tax estimate
Build the totals. 1,000 x $0.50 short-term = $500. 1,000 x $2.00 long-term = $2,000. 1,000 x $0.25 return of capital = $250. Total: $2,750.
Size it. 1,000 shares at a $50 NAV is $50,000 invested, so the total rate is $2,750 / $50,000 = 5.50%, or 1.10% per year over 5 years.
Tax the short-term portion as ordinary income. A single filer with $40,000 of taxable income pays 12% on the next $500, so the short-term tax is $60.
Stack the long-term portion. The stack reaches $40,500 before the long-term dollars start, and the single-filer zero-rate band runs to $49,450, so all $2,000 is taxed at 0%: $0.
Finish. Income is far below the $200,000 NIIT threshold, so no surtax. Total estimated tax: $60. After-tax distribution: $2,690.
| Shares | Total per share | NAV | Years | Total rate | Per year |
|---|---|---|---|---|---|
| 1,000 | $2.75 | $50 | 5 | 5.50% | 1.10% |
| 1,000 | $2.75 | $25 | 5 | 11.00% | 2.20% |
| 1,000 | $2.75 | $100 | 5 | 2.75% | 0.55% |
| 2,000 | $5.00 | $40 | 5 | 12.50% | 2.50% |
| 5,000 | $10.00 | $100 | 2 | 10.00% | 5.00% |
The same $2.75 per share is an 11.00% event at a $25 NAV and a 2.75% event at a $100 NAV, which is why the rate needs the share price, not just the payout. The tax side moves just as much with income; each row below came from this calculator and was checked by hand.
| Scenario (2026) | Short-term tax | Long-term tax | NIIT | Total estimated tax |
|---|---|---|---|---|
| Single, $40,000, ST $500 / LT $2,000 | $60.00 | $0.00 | $0.00 | $60.00 |
| Single, $45,000, ST $0 / LT $10,000 | $0.00 | $832.50 | $0.00 | $832.50 |
| Joint, $150,000, ST $2,000 / LT $8,000 | $440.00 | $1,200.00 | $0.00 | $1,640.00 |
| Single, $600,000, ST $0 / LT $50,000 | $0.00 | $10,000.00 | $1,900.00 | $11,900.00 |
The second row is the one flat-rate calculators get wrong: $4,450 of the $10,000 fits under the $49,450 zero-rate line and only $5,550 is charged at 15%: $832.50, not the $1,500 a flat 15% suggests. In the last row the long-term portion sits past the $545,500 line, so it pays 20% plus the 3.8% surtax.
Where the per-share figures come from, and how each part is taxed
A capital gains distribution is not a dividend. Dividends pass through income the underlying companies earned; a distribution passes through profit the fund itself made when its manager sold holdings for more than they cost. Funds announce it per share ahead of the payment date; your statement and Form 1099-DIV then report your totals, the long-term part in box 2a and any return of capital in box 3 (nondividend distributions).
One reporting quirk shapes the inputs above. According to IRS Publication 550 on investment income and expenses, a capital gain distribution is treated as long-term regardless of how briefly you personally held the fund shares. A fund’s short-term gains cannot be passed through as short-term gains; the fund pays them out as ordinary dividends instead, which is why the short-term input here is taxed at ordinary rates. Two consequences follow. Reinvesting does not shelter the distribution: in a taxable account the short-term and long-term parts are taxed in the year paid, and the reinvested amount raises your basis. Return of capital runs the other way: not income when paid, but each payment lowers your basis, so tax shows up later as a larger gain when you sell, and any return of capital past a zero basis is taxed as capital gain then. Losses elsewhere can soften the bill, which is where the capital loss deduction calculator comes in for working out how much loss you can apply in a given year, and the after-tax yield calculator handles the keep-rate side of comparing two funds after tax.
What the tax estimate leaves out
The estimate is federal only, and four limits are worth knowing. It uses taxable income plus this distribution as a stand-in for modified adjusted gross income in the NIIT check; on a real return MAGI is measured before deductions, so near a threshold the surtax can be understated. It does not apply capital losses or carryovers, which net against the distribution on a real return. It does not model state tax, the alternative minimum tax, or the special 25% and 28% rate groups in IRS Topic No. 409 on capital gains and losses, none of which apply to ordinary mutual fund distributions. Inside an IRA or 401(k) none of this is taxed as it lands at all. Finally, this page is about distributions from a fund you still hold; it is not the capital gearing ratio calculator, which measures how much of a company capital structure carries fixed obligations, and it is not the capital increase calculator, which measures how much a capital base itself grew between two dates.
What competing calculators miss
Search this exact phrase and the results split into two camps: tax calculators built for selling an asset, and guides that do the per-share multiplication and stop. Neither does the whole job this page now does.
Miss 1: sale tools answering a distribution question. The big tax calculators ask for a purchase price, a sale price and a cost basis. A fund shareholder who has sold nothing has none of those numbers; what they have is shares and a per-share figure from a fund notice, which is exactly where this tool starts.
Miss 2: a flat tax rate on the long-term portion. Guides routinely multiply the whole long-term distribution by 15%. That overstates the bill whenever part of the gain stacks into the 0% band (worth $667.50 in the $10,000 scenario above) and understates it at the top, at 20% plus the 3.8% surtax.
Miss 3: return of capital taxed as income, or ignored. Most tools lump every dollar paid into the tax base or never mention return of capital. Treating it as basis reduction, as Publication 550 requires, keeps it out of this year’s tax while still counting it in the cash and the rate.
Frequently Asked Questions
A payment from a mutual fund or similar pooled fund that passes through profits the fund made by selling holdings for more than they cost. It is not a dividend, which passes through income from the underlying companies. Funds announce it per share, usually paid once a year, often in December, to shareholders on the record date. Your total is the per-share amount times the shares you held.
On the fund distribution notice, your year-end statement, or Form 1099-DIV. The long-term total is in box 2a and return of capital in box 3 (nondividend distributions); divide either total by the shares held on the record date for the per-share figure. The short-term part is paid out with ordinary dividends, and the fund notice is where it is broken out per share.
Yes, as a federal estimate for tax year 2026. The tool taxes the short-term portion at ordinary rates, stacks the long-term portion at the 2026 rates of 0%, 15% and 20% from IRS Revenue Procedure 2025-32, and adds the 3.8% net investment income tax where it applies. State tax and capital loss offsets are not included, so treat it as a planning estimate, not a filed return.
Because the long-term bands are measured on total taxable income, and your other income fills them first. For 2026 a single filer pays 0% while total taxable income stays at or under $49,450. If your other income plus the short-term portion comes to $40,500, the first $8,950 of long-term distribution still fits in the 0% band; only the part above the line is charged at 15%.
Not when it is paid. A return of capital distribution, reported in box 3 of Form 1099-DIV, is your own money coming back, so the tool counts it in the cash total and the rate but leaves it out of the tax estimate. Each payment reduces your cost basis instead. Once basis reaches zero, further return of capital is taxed as capital gain, and a lower basis means a larger taxable gain when you sell.
In a taxable account, generally yes. According to IRS Publication 550, capital gain distributions are taxable in the year paid whether you take them in cash or reinvest them; reinvesting raises your cost basis instead. Inside an IRA or 401(k), the distribution is not taxed as it lands.
Buying fund shares shortly before the record date, so you receive a distribution built from gains that accrued before you invested, and owe tax on it. The fund price drops by roughly the distribution amount on the payment date, so you have not gained anything except the tax bill. Checking the distribution calendar before a late-year purchase avoids it.
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References
- Internal Revenue Service, “Revenue Procedure 2025-32: Tax Inflation Adjustments for Tax Year 2026” – the 2026 rate schedules and long-term thresholds the estimate is built on. IRS: Tax Inflation Adjustments for Tax Year 2026. Accessed October 2026.
- Internal Revenue Service, “Topic No. 409: Capital Gains and Losses” – the 0%, 15% and 20% rate structure and the special 25% and 28% rate groups. IRS: Topic No. 409, Capital Gains and Losses. Accessed October 2026.
- Internal Revenue Service, “Topic No. 559: Net Investment Income Tax” – the 3.8% tax, its lesser-of formula, and the MAGI thresholds. IRS: Topic No. 559, Net Investment Income Tax. Accessed October 2026.
- Internal Revenue Service, “Publication 550: Investment Income and Expenses” – how fund distributions are reported and taxed, and the basis rules for return of capital. IRS: Publication 550, Investment Income and Expenses. Accessed October 2026.
- Internal Revenue Service, “Mutual Funds (Costs, Distributions, etc.)” – IRS answers confirming capital gain distributions count as long-term however briefly the shareholder held the fund. IRS: Mutual Funds (Costs, Distributions, etc.). Accessed October 2026.
- Internal Revenue Service, “About Form 1099-DIV, Dividends and Distributions” – the form reporting capital gain distributions (box 2a) and nondividend distributions (box 3). IRS: About Form 1099-DIV. Accessed October 2026.
- Financial Industry Regulatory Authority (FINRA), “Mutual Funds” – investor guidance on how mutual funds work, including distributions. FINRA: Mutual Funds. Accessed October 2026.