When you annuitize a non-qualified annuity — converting it into a stream of income payments — not every dollar you receive is taxable. Part of each payment represents a return of your original investment (cost basis), which you already paid tax on. That portion is tax-free. The exclusion ratio tells you exactly what percentage.
Key Takeaways
- The exclusion ratio applies only to annuitized non-qualified annuities (funded with after-tax money)
- It splits each payment into taxable (gain) and non-taxable (return of cost basis) portions
- Formula: Exclusion Ratio = Investment in Contract ÷ Expected Return
- Once you’ve received all your cost basis back, 100% of payments become taxable
- For qualified annuities (IRA/401k funded), 100% of every payment is taxable — no exclusion ratio applies
What Is the Annuity Exclusion Ratio?
The exclusion ratio is a percentage that determines how much of each annuity payment you receive tax-free. It’s calculated by dividing your investment in the contract (your cost basis — the after-tax dollars you put in) by your expected return (the total amount you expect to receive over the life of the annuity).
Formula: Exclusion Ratio = Investment in Contract ÷ Expected Return
The result tells you what fraction of each payment represents a return of your own money versus earnings. The return-of-basis portion is excluded from gross income. The earnings portion is taxable as ordinary income.
Exclusion Ratio Calculation: Step-by-Step Example
Carol, age 70, annuitizes a non-qualified MYGA. Here are the facts:
- Her investment in the contract (cost basis): $150,000
- Monthly payment: $1,100/month
- Annual payment: $13,200
- IRS life expectancy factor at age 70: 17 years (from IRS Publication 939)
- Expected return: $13,200 × 17 = $224,400
Exclusion Ratio: $150,000 ÷ $224,400 = 66.8%
This means:
- 66.8% of each payment ($1,100 × 66.8% = $735) is tax-free return of basis
- 33.2% of each payment ($1,100 × 33.2% = $365) is taxable income
- Annual taxable income from this annuity: $365 × 12 = $4,380
Without the exclusion ratio, all $13,200/year would be taxable. With it, only $4,380 is — a significant difference, especially for someone managing Medicare premium thresholds and Social Security taxation.
Where Does the IRS Life Expectancy Factor Come From?
The IRS provides actuarial tables in Publication 939 that assign a life expectancy factor based on your age (and annuity type — single life, joint life, etc.) at the time you begin payments. The factor is set at the start and does not change, even if you live longer than expected.
For single-life annuities, the relevant table is Table V in IRS Publication 939. For joint-life annuities, use Table VI. These tables are updated periodically by the IRS based on current mortality data.
What Happens After You’ve Recovered Your Full Cost Basis?
Once you’ve received tax-free payments totaling your full investment in the contract (your cost basis), the exclusion ratio no longer applies. From that point forward, 100% of every payment is taxable as ordinary income.
Using Carol’s example: her $150,000 cost basis divided by her $735 tax-free monthly amount means she’ll fully recover her basis after approximately 204 payments — 17 years. If she lives beyond age 87, every payment after that point is fully taxable.
Conversely, if she dies before recovering her full basis, the unrecovered basis can be claimed as a deduction on her final income tax return.
Exclusion Ratio vs. LIFO: What’s the Difference?
The exclusion ratio applies to annuitized annuities — those converted to income payments. It’s different from the LIFO (last in, first out) rule, which applies to non-annuitized withdrawals from deferred annuities.
| Situation | Tax Rule | Effect |
|---|---|---|
| Withdrawing from a deferred annuity (not annuitized) | LIFO — gains come out first | Fully taxable until all gains are exhausted, then tax-free principal |
| Receiving payments from an annuitized contract | Exclusion ratio | Each payment is partially taxable, partially tax-free from day one |
| Qualified annuity (IRA-funded), any payout method | 100% taxable | No exclusion ratio, no LIFO distinction — all taxable |
Does the Exclusion Ratio Apply to All Annuities?
No. The exclusion ratio only applies to non-qualified annuities — those funded with after-tax dollars outside of an IRA or 401(k). For qualified annuities (where contributions were pre-tax), there is no cost basis, so every dollar of every payment is fully taxable as ordinary income.
If you roll a 401(k) into an annuity and annuitize it, 100% of each payment is taxable — there’s nothing to exclude. The same applies to traditional IRA annuities.
For a complete overview of annuity tax treatment, see How Are Annuities Taxed? Complete 2026 Guide.
Frequently Asked Questions
What is the annuity exclusion ratio?
The exclusion ratio is the percentage of each annuity payment that is excluded from income tax because it represents a return of your original after-tax investment. It equals your investment in the contract divided by your expected return over the life of the annuity.
How do I calculate my annuity exclusion ratio?
Divide your investment in the contract (total after-tax dollars deposited) by your expected return (total payments you expect to receive). Use IRS life expectancy tables from Publication 939 to calculate expected return. Your annuity carrier can also provide this calculation at the time of annuitization.
What happens to the exclusion ratio if I die early?
If you die before recovering your full investment through tax-free payments, the unrecovered portion of your cost basis is deductible as a miscellaneous itemized deduction on your final federal income tax return. Your estate or beneficiaries claim this deduction.
Does the exclusion ratio apply to IRA annuities?
No. Annuities funded through traditional IRAs or 401(k) plans have no cost basis (contributions were pre-tax). Every dollar received as income is fully taxable as ordinary income. The exclusion ratio only applies to non-qualified annuities funded with after-tax money.
Where do I report the taxable portion of annuity payments?
Your annuity carrier sends a Form 1099-R each year showing total distributions and the taxable amount. The taxable portion is reported on Line 5b of Form 1040. Your carrier calculates the exclusion ratio and reports it; you should receive a breakdown with your first payment schedule.
