How Much of Your Annuity Payment Is Actually Taxable?
Less than you might think — if you funded the annuity with after-tax money. The exclusion ratio is the formula the IRS uses to split each payment between tax-free return of your investment and taxable earnings. For a non-qualified annuity that is annuitized or paid as a SPIA, a meaningful portion of every check comes back to you completely tax-free.
What Is the Exclusion Ratio?
The exclusion ratio is a percentage that tells you how much of each annuity payment is a tax-free return of your original after-tax investment (called your “investment in the contract”) versus taxable earnings. It applies when you annuitize a deferred annuity or purchase a Single Premium Immediate Annuity (SPIA).
The IRS establishes this ratio at the time annuity payments begin. It stays fixed for the life of the payment stream. Each month, the same percentage of your check is excluded from income — hence the name.
The Formula
The exclusion ratio has two inputs:
- Investment in the contract: Your total after-tax cost basis — the premiums you paid with money that was already taxed.
- Expected return: The total payments you are expected to receive over the payment period, calculated using IRS life expectancy tables or the fixed term of the payout.
Exclusion Ratio = Investment in the Contract / Expected Return
The resulting percentage is the tax-free share of each payment. The remainder is taxable ordinary income.
Step-by-Step Example: Life-Only SPIA
James is 68 years old. He purchases a non-qualified SPIA with $180,000 from his savings account. The insurer quotes him a monthly payment of $1,050 for life.
Step 1 — Investment in the contract: $180,000 (his after-tax premium, all cost basis).
Step 2 — Expected return: The IRS uses life expectancy tables to calculate this. At age 68, the IRS Table V assigns a life expectancy of approximately 17.6 years. At $1,050 per month, that is $1,050 x 12 x 17.6 = $221,760.
Step 3 — Exclusion ratio: $180,000 / $221,760 = 81.2%
Step 4 — Apply to each payment:
- Monthly payment: $1,050
- Tax-free portion: $1,050 x 81.2% = $852.60
- Taxable portion: $1,050 x 18.8% = $197.40
James receives $1,050 per month but only reports about $197 as taxable income. At a 22% bracket, his monthly federal tax on the annuity payment is roughly $43 — not the $231 he would owe if the entire payment were taxable.
What Happens After You Recover Your Full Cost Basis?
The exclusion ratio works until you have received payments totaling your full investment in the contract. Once you have recovered 100% of your cost basis tax-free, every payment thereafter is fully taxable as ordinary income.
Using James as the example: his $180,000 basis is recovered at $852.60 per month. That takes approximately 211 months — about 17.6 years. If James lives to 85 or beyond, payments after that point are 100% taxable.
This design encourages people to think carefully about longevity. The longer you live past your life expectancy, the more fully taxable income you receive — but you are also collecting more total payments, so it is still a favorable outcome overall.
Period Certain and Other Payout Options
Not all annuity payouts are life-only. Many people choose payout options that guarantee payments for a fixed period or include a joint survivor benefit. The exclusion ratio calculation adjusts for each.
Period Certain Payout
If you choose a 20-year period certain payout, the expected return is simply the monthly payment multiplied by 240 months. There is no life expectancy table involved — the term is fixed.
Example: $150,000 investment, $850/month for 20 years. Expected return = $850 x 240 = $204,000. Exclusion ratio = $150,000 / $204,000 = 73.5%. Each $850 payment includes $624.75 tax-free and $225.25 taxable.
Joint and Survivor Payout
When payments continue over two lives — typically a married couple — the IRS uses a combined life expectancy, which is longer than either individual’s expectancy alone. A longer expected return means a lower exclusion ratio, since the same cost basis is spread over more payments.
Example: Same $180,000 investment, but now payments cover a 68-year-old and a 65-year-old spouse. The IRS Table VI gives a combined expectancy of roughly 24.4 years. Expected return = $1,050 x 12 x 24.4 = $307,440. Exclusion ratio = $180,000 / $307,440 = 58.6%. Each payment has a smaller tax-free portion than the life-only version — but the payout is guaranteed for longer.
Exclusion Ratio vs. LIFO: Key Difference
The exclusion ratio only applies when you annuitize — converting the contract into a stream of guaranteed payments. It does not apply to partial withdrawals from a deferred annuity.
If you take a partial withdrawal from a non-qualified deferred annuity before annuitizing, the IRS applies the “last in, first out” (LIFO) rule instead. Under LIFO, gains are considered withdrawn first. Every dollar you take out is fully taxable until you have exhausted all the accumulated earnings. Only after all gains are withdrawn does your tax-free cost basis begin to come out.
The exclusion ratio is more favorable for systematic income planning. LIFO creates a larger near-term tax burden, which is why many people choose to annuitize rather than take ad-hoc withdrawals when they want steady income. Learn more about how cost basis and the LIFO rule affect annuity withdrawals.
Does the Exclusion Ratio Apply to Qualified Annuities?
No. If your annuity was funded with pre-tax money from a traditional IRA, 401(k), or other qualified plan, the exclusion ratio does not apply. Your cost basis in those accounts is $0 — the IRS gave you a deduction when the money went in, so it taxes all of it coming out. Every payment from a qualified annuity is 100% taxable ordinary income.
The exclusion ratio is exclusively a non-qualified annuity benefit. It rewards people who funded their annuity with after-tax savings by ensuring they are not taxed twice on the money they already paid taxes on.
Roth IRA Annuities
If an annuity is held inside a Roth IRA and meets the qualified distribution rules (account open 5+ years, owner age 59 1/2 or older), payments are entirely tax-free. There is no exclusion ratio calculation needed because Roth distributions are not taxable at all. The exclusion ratio is only relevant for non-qualified annuities outside of a Roth structure.
Tracking Your Exclusion Ratio
When your annuity payments begin, the insurance company should provide a breakdown showing your exclusion ratio and the taxable and tax-free portions of each payment. This information is also used to prepare your annual tax forms.
The carrier typically issues a Form 1099-R each year. Box 2a shows the taxable portion of payments received. If the carrier has calculated the exclusion ratio correctly, you should be able to verify that your payments match your expected split.
Keep your original annuity application, the illustration showing expected payments, and any documentation of your original premium. If you did a 1035 exchange before annuitizing, your cost basis from the prior contract carries over — make sure the new carrier has that figure on file.
Practical Planning Considerations
The exclusion ratio can meaningfully reduce the taxable portion of your retirement income, which has downstream benefits beyond just the tax savings:
- Medicare premiums (IRMAA): Medicare Part B and D premiums are income-based. A lower taxable income from annuity payments can keep you in a lower IRMAA tier.
- Social Security taxation: The threshold at which Social Security benefits become taxable depends on your combined income. Lower taxable annuity income can reduce how much of your Social Security benefit gets taxed.
- Required Minimum Distributions: Non-qualified annuities outside of an IRA are not subject to RMD rules. Annuitized payments handle the distribution schedule automatically, with the favorable exclusion ratio applying throughout.
For retirees who have significant after-tax savings and want predictable income, a non-qualified SPIA or annuitized contract with the exclusion ratio can be one of the most tax-efficient income sources available. Use our annuity income calculator to estimate what a deposit would pay monthly and what portion would likely be tax-free.
Frequently Asked Questions
Does the exclusion ratio change once it is set?
No. The ratio is fixed when payments begin and stays the same for the life of the payment stream. The only exception is if the payout structure changes — which is rare once annuitization has started.
What if I live longer than my life expectancy?
Once your cumulative tax-free payments equal your full cost basis, the exclusion ratio no longer applies. All payments after that point are 100% taxable ordinary income. This is a known feature of annuitization — longer life means more fully taxable payments late in retirement, but also more total payments received.
What if I die before recovering my full cost basis?
On a life-only payout, payments stop at death. Any unrecovered cost basis is lost — there is no deduction or refund. This is the trade-off for a life-only payout that typically offers the highest monthly payment. If leaving unrecovered basis to heirs matters, a period certain or refund option payout can protect against early death, though those options result in a lower monthly payment.
Does the exclusion ratio apply to fixed index annuity income riders?
It depends. A GLWB income rider that pays a guaranteed lifetime withdrawal benefit without annuitizing the contract follows the LIFO rule — gains come out first, then cost basis. If the contract is fully annuitized, the exclusion ratio applies. Most income rider withdrawals are not technically annuitization, so LIFO typically governs. Always review the contract language or ask the carrier directly.
Can I calculate my own exclusion ratio before buying?
You can estimate it. You need your expected premium (your cost basis) and the insurer’s projected monthly payment, then apply the relevant IRS life expectancy from Publication 575. The exact ratio is officially set by the carrier at issue using IRS-approved tables. Request a personalized illustration from the carrier or your advisor before purchasing — it will show you the expected taxable and tax-free breakdown.
Related Resources
- Cost Basis in an Annuity: How It Affects Your Taxes
- Single Premium Immediate Annuity (SPIA) Guide
- Annuity Income Calculator
- Fixed Index Annuity Guide
- Get a Free Annuity Quote
- Income Annuities: SPIA, DIA, GLWB & QLAC Explained
