Ira Annuity Calculator

An IRA annuity takes the money sitting in your Individual Retirement Account and converts it into a stream of payments you can count on. The question is always the same: how much monthly income does my balance actually buy, and is that better than leaving the money invested and withdrawing from it? This calculator answers both parts with the annuity payout formula, showing your estimated payment, total payouts over the term, and how it stacks up against the 4% withdrawal rule. It is an IRA tool first: every dollar of IRA annuity income is taxed as ordinary income, because the contributions were pre-tax, and that tax fact changes the comparison in a way a generic payout tool cannot show.

For the generic version of the same payout math, with no IRA tax treatment and no 4% benchmark, see our annuity income calculator. If you want market quotes from real insurers instead of a formula estimate, our instant annuity calculator uses insurer quote surveys. This page is for the IRA decision: annuitize this balance, or keep drawing from it yourself.

Quick Answer

How the IRA annuity payout math works

The payout comes from the present-value-of-an-annuity formula, solved for the payment: PMT equals PV times r divided by one minus one plus r to the power of minus n. PV is your IRA balance, r is the rate per payment period, and n is the number of payments. The unpaid balance keeps earning interest while you draw it down, so the total paid out is always more than the balance you started with, provided the rate is above zero.

The tool runs the formula in three steps, and you can follow each one with the worked example. First, your balance becomes the premium: $400,000 in the example. Second, the rate and term set the payment count: 5% a year over 240 monthly payments for a 20-year term. Third, the payment comes out: $2,639.82 a month before rounding, shown as $2,640. The remaining balance keeps earning 5% between payments, which is why the total, $633,558, exceeds the $400,000 you put in by $233,558 of interest.

Two input behaviours are worth knowing before you trust a result. The live tool clamps rather than errors: a negative balance is treated as zero, a negative rate as zero, and a term below one year as one year. And the two lifetime options are estimates, not quotes: starting at 65 uses about 20 years and starting at 70 uses about 16 years, as simplified remaining-life figures. Insurers price with full mortality tables adjusted for gender and health, so get a real quote before deciding, and use our instant annuity calculator for the quote-survey view.

IRA annuity versus the 4% withdrawal rule

The 4% rule says withdraw 4% of the balance in year one, then adjust for inflation, aiming to make savings last about 30 years. An IRA annuity takes the opposite bet: it converts the balance into fixed payments that spend the principal down over the chosen term. Neither is right in the abstract. The right question is which trade-off you want, and the table makes it concrete.

	IRA annuity (worked example)	4% rule withdrawals
Monthly income on $400,000	$2,640	$1,333
Money locked in	Yes, for the term	No, full access kept
What heirs get	Nothing after the term ends, unless a refund option was bought	Whatever balance remains
Inflation	Fixed checks lose purchasing power unless indexed	Withdrawals rise with inflation by design
Market risk	None once payments start	A bad market sequence early in retirement can break the plan

The tool’s verdict badge encodes the comparison honestly. At 150% of the 4% rule or more it reports the percentage; from 100% to 150% it says the annuity beats the rule; below 100% it says it is below the rule. If the annuity does not beat balance times 4% divided by 12, keeping the money invested may do better. To project that invested path, our investment growth calculator shows what the balance becomes if you leave it compounding. And if you want the whole-retirement version of the question, driven by your expenses rather than one account, our withdrawal retirement calculator prices the full plan.

Payout rates change the check more than you think

Term and rate are the two levers, and rate moves the check faster than most people expect. The table below is computed from the same formula the tool uses, on a $400,000 balance at monthly frequency, and every figure was verified against the tool.

Term	Rate 4%	Rate 5%	Rate 6%
15-year fixed	$2,959 per month	$3,163 per month	$3,375 per month
20-year fixed	$2,424 per month	$2,640 per month	$2,866 per month
25-year fixed	$2,111 per month	$2,338 per month	$2,577 per month

One extra point of payout rate is worth roughly $200 to $240 a month on this balance, which is why shopping carriers for the best rate matters more than any fee tweak. Shorter terms pay more per month but a smaller lifetime total: the 15-year option at 5% pays $3,163 a month but only $569,371 in total, against $633,558 over 20 years. Longer terms do the reverse. Start later and the same logic applies: waiting from 65 to 70 shortens the expected payout window, so the same balance buys a bigger monthly payment, $3,031 a month on the 16-year lifetime estimate at 5%, against $2,640 over 20 years.

The tax side of IRA annuity income

Tax is where the IRA version differs most from a generic annuity, and it is the reason this page exists separately from the generic tool. A non-qualified annuity, bought with after-tax dollars, taxes only the earnings portion of each payment, with part of each check treated as a tax-free return of principal. An IRA annuity is funded with pre-tax money, so the entire payment is taxed as ordinary income. There is no tax-free slice. IRS guidance on individual retirement arrangements sets out the IRA framework behind that treatment.

Three other IRA rules shape the decision. First, required minimum distributions: for traditional IRAs, RMDs begin at age 73 for people born from 1951 to 1959, and at age 75 for people born in 1960 or later, under the SECURE 2.0 schedule. Payments from an annuitized IRA generally satisfy the RMD for that contract, so annuitizing can simplify the RMD problem, but it does not remove it for money left outside the contract. To see an RMD schedule for a single IRA, our IRA drawdown calculator builds one from the IRS Uniform Lifetime Table. Second, early withdrawals: taking money out before age 59.5 generally adds a 10% penalty on top of tax. Third, contribution limits: for 2026 the IRA limit is $7,500, plus a $1,100 catch-up at age 50 or older, per IRS 2026 limit guidance. Those limits govern money going in, not the annuity math, but they set the size of the balance you are converting.

One planning tool deserves a paragraph of its own. A qualifying longevity annuity contract, bought inside a traditional IRA, lets you defer part of the balance past RMD age, with income starting no later than age 85, and the amount used to buy it is excluded from the RMD calculation until payments begin. For 2026 the maximum QLAC premium is $210,000 per person, a lifetime limit across eligible accounts. That is a correction to older figures still circulating, which cite $200,000: the limit rose to $210,000 for 2025 and stayed there for 2026.

What competing IRA annuity calculators get wrong

Several competing tools mix up accumulation and payout: they ask for annual contributions and a retirement date, then quietly switch to a payout phase with a different rate, without showing the seam. OwnCalculator’s IRA annuity calculator is the clearest example: it grows $50,000 with $6,500 a year of contributions for 25 years, then reports a payout, so the number you see blends 25 years of saving with the payout math and cannot be checked against a balance you hold today. AnnuityExpertAdvice’s IRA calculator is a quote funnel first: its payout figures come from annuity products with guaranteed lifetime withdrawal benefits, and the call to action is a consultation, so the number is a sales starting point rather than a reproducible formula result. CalcStack’s annuity payout calculator is stronger on tax, explaining the qualified versus non-qualified split well, but it is generic: it carries no IRA-specific 4% benchmark and no RMD context. Macaron’s annuity payout calculator adds a genuinely useful mode this tool lacks, solving for how long a balance lasts at a fixed payment, but it is generic too, with no IRA tax treatment and no benchmark. NeftCal and CalculatorKits run the same payout formula competently and stop there, with no benchmark and no tax framing. The winning moves here are the combination: a balance-today formula with no hidden accumulation phase, the IRA tax rule stated up front, the 4% benchmark as a verdict badge, and lifetime options labelled as estimates rather than quotes.

Three ways to boost the monthly check

First, start later. Waiting from 65 to 70 shortens the expected payout window, so the same balance buys a bigger monthly payment. Deferring also lets the balance grow longer if you are still contributing. Second, shop at least three carriers. Payout rates differ by insurer because each prices its own mortality pool and bond portfolio, and a half-point better rate on a large balance is worth thousands a year. Third, consider a QLAC inside the IRA for the longevity tail: it buys income for your 80s and 90s while keeping RMDs lower in the meantime, at the cost of locking that money away. A fourth option, partial annuitization, is worth naming even though this tool models a full balance: annuitize enough to cover essential spending and leave the rest invested and liquid, so you get the guaranteed floor without giving up access to everything.

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