Does cost basis actually lower my annuity tax bill?
It lowers the tax on your final dollar out, but rarely on your first one. Cost basis is the after-tax money you deposited, and only your growth above that number is ever taxable. The timing trips people up: on a non-qualified annuity, the IRS treats every withdrawal as gain first, so you cannot touch your tax-free basis until every dollar of growth has already come out and been taxed. Know your basis before you take a distribution, because it decides exactly how much of that check is taxable and how much comes back to you tax-free.
What is cost basis in an annuity?
Your cost basis is the slice of the contract made of money you already paid income tax on before it ever reached the insurance company. Think of it as your own skin in the game, the part of the account that comes back to you without another tax bill attached, because the IRS already collected on it once.
A non-qualified annuity, one you fund with savings, a brokerage account or a matured CD, gets its basis from every after-tax premium you send in. Put in $180,000 across two deposits and your basis is $180,000, flat. Anything the account earns on top of that is fair game for taxation the moment you pull it out.
A qualified annuity works the opposite way. Fund it with pre-tax dollars from a traditional IRA or an old 401(k), and your basis usually starts at zero, because nobody has paid tax on that money yet. The government collects on all of it as you withdraw, not just the growth.
Non-qualified versus qualified: two different starting points
A non-qualified contract funded with after-tax money
Every dollar you hand the carrier from your checking account, a brokerage transfer or a maturing CD becomes part of your basis. Only what grows on top of those deposits gets taxed later.
Example: Diane, 63, moves $180,000 from savings into a 6-year MYGA. By the time it matures, the contract is worth $246,000. Her basis stayed at $180,000 the whole time, so the $66,000 the account earned is the only part subject to ordinary income tax when she takes the money.
A qualified contract funded with pre-tax money
Roll a traditional IRA or 401(k) into an annuity and your basis is typically $0, since you got a deduction when that money first went in. Every withdrawal is fully taxable as a result.
The one exception is a non-deductible IRA contribution. If you ever put after-tax dollars into a traditional IRA and reported it on IRS Form 8606, that portion becomes real basis you can claim. It does not come up often, but losing track of it means paying tax twice on money the government already taxed once.
The LIFO rule: why your gain has to come out before your basis does
Non-qualified annuities do not let you pick which dollars leave first. The tax code applies a last-in-first-out rule: whatever the contract has earned is treated as coming out ahead of your original deposit, every time, until the gain is used up.
That is the reverse of how annuitized income gets taxed, and it surprises a lot of owners the first time they take a partial withdrawal instead of the whole balance.
Example: Walter, 67, holds a non-qualified annuity with a $90,000 basis that has grown to $120,000, a $30,000 gain. He asks for a $20,000 withdrawal to cover a kitchen remodel.
- The contract's current gain is $30,000.
- Because of LIFO, the entire $20,000 he takes counts as taxable gain.
- His remaining gain in the contract falls from $30,000 to $10,000.
- His $90,000 basis has not been touched.
Had Walter asked for $35,000 instead, the first $30,000 would be fully taxable gain and the last $5,000 would come out as tax-free basis. After that withdrawal his basis would sit at $85,000, with no gain left in the contract.
Annuitization and the exclusion ratio
Once you convert the contract into a stream of guaranteed payments, a step called annuitization, LIFO stops applying. In its place, the IRS spreads your basis evenly across the payments you are expected to receive using the exclusion ratio.
Formula: Exclusion ratio = cost basis divided by total expected payments.
Example: Louise, 70, annuitizes a non-qualified contract with a $140,000 basis. Based on her age and payout option, the insurer expects her to collect $200,000 over her lifetime. Her exclusion ratio comes out to 70% ($140,000 divided by $200,000). Out of every $1,000 monthly check:
- $700 is a tax-free return of basis.
- $300 is taxable interest income.
Once Louise has collected $140,000 in tax-free payments, her entire basis has been recovered, and every payment after that is fully taxable. Anyone who outlives their life expectancy under the contract ends up paying full ordinary income tax on every dollar received past that point.
What changes your cost basis
| Event | Effect on cost basis |
|---|---|
| Adding another after-tax premium | Raises basis by whatever you deposit |
| Withdrawal that is all gain (LIFO applies) | No change, since gain comes out first |
| Withdrawal bigger than the remaining gain | Basis drops by the amount over the gain |
| 1035 exchange into a new contract | Both basis and gain transfer to the new annuity |
| Owner's death | Basis passes through unchanged, with no step-up |
| Annuitized payments received | Basis is recovered gradually through the exclusion ratio |
| Surrender charges | Typically reduce the gain, not the basis |
No step-up in basis when you die
This catches a lot of families off guard. Stocks, real estate and mutual funds usually get a stepped-up basis at death, resetting to the value on the date of death under current tax law. Annuities do not get that treatment.
Whoever inherits your annuity also inherits your original cost basis, not today's account value, and owes ordinary income tax on everything the contract earned above that basis. There is no capital-gains break here, it is taxed the same as wage income.
Example: Harold buys a non-qualified annuity for $120,000. By the time he dies it is worth $205,000. His son receives the $205,000 death benefit and owes ordinary income tax on the $85,000 gain. In the 24% bracket, that is $20,400 in federal tax on money Harold never touched.
Because of this, an annuity is not always the strongest vehicle for passing money to heirs. Talk with a tax professional or licensed strategist about how the lack of a step-up fits your estate plan before leaning on an annuity for that purpose.
Cost basis and 1035 exchanges
A 1035 exchange moves your money from one annuity to another without triggering a taxable event. Your basis and whatever gain you have accumulated both travel with you to the new contract. It is tax-deferred, not tax-free, so the bill on that gain is still waiting whenever you eventually withdraw.
One practical wrinkle: the receiving carrier gets your money by wire or transfer and may not automatically get your purchase history along with it. Hold on to your original application, every annual statement and the exchange paperwork itself. Owners who do several exchanges over the years sometimes assume each new company is tracking their original basis. That is not guaranteed. Keeping the paper trail is on you, or on whoever handles your taxes.
How to find your own cost basis
- Your annual statement. Most carriers print "investment in the contract" or "cost basis" right next to your current value and gain. This is usually the fastest way to check.
- Your original application. It records what you paid in at the start. If you added money later, the follow-up paperwork from those deposits fills in the rest.
- IRS Form 1099-R. A carrier sends you this form for the tax year of any distribution. Box 2a spells out the taxable share of the payout, and a separate box tied to your investment in the contract can point to your basis, though the exact layout differs by insurer and by tax year.
- IRS Form 8606. If a traditional IRA holding the annuity ever received non-deductible contributions, this form is your record of that after-tax basis. Keep every year you filed one.
- A direct call to the carrier. Before a large withdrawal, a surrender or a 1035 exchange, ask customer service for a written cost basis letter. Get the number in writing before you rely on it.
We can help you pull your current cost basis together with your carrier and walk through what a specific withdrawal, exchange or distribution would mean for your tax return before you make it.
Frequently asked questions
How is cost basis different from my account value?
Account value is the whole pot, whatever you deposited plus whatever it has earned since. Basis is only the deposit half of that pot, the part the government already collected tax on. Subtract one from the other and you have the size of your taxable gain.
Will I owe tax on the basis portion of a withdrawal?
Not on the basis itself, since that money was taxed the year you earned it. The catch is timing: a non-qualified contract pays out earnings before basis, so a partial withdrawal often counts as fully taxable until the growth runs out.
What happens to my cost basis after a 401(k) rollover?
Most rollovers carry a $0 basis into the annuity, since 401(k) contributions are typically pre-tax and untaxed money stays untaxed until it comes out. Check with your plan administrator first if you ever contributed after-tax dollars, since that slice would follow you as real basis.
Does exchanging contracts wipe out my existing cost basis?
No, a properly done 1035 exchange carries your basis and your gain straight into the replacement contract. Nothing about the swap forgives the eventual tax bill, it only postpones it again.
Is there a way to raise my cost basis later?
Only by sending in more after-tax money, and plenty of MYGAs and traditional fixed annuities are built to take a single deposit and nothing more. A handful of fixed index products accept added premium in the earliest year or two, so read the contract rather than assume.
Does an RMD from an IRA annuity touch my cost basis?
Not usually, because a traditional IRA annuity typically starts with no basis at all. Pulling a required distribution does not create one, so that whole payment lands on your return as ordinary income.
Written and reviewed by
James Forren Warren
Licensed Retirement Income Strategist · License #20551202
James Forren Warren is a licensed Retirement Income Strategist with Tax Free Wealth Plan. For the past five years he has helped individuals and families turn their savings into retirement income they can count on. He writes and reviews the annuity research on this site and keeps it plain: what a product does, what it costs you, and who it actually fits.
Sources
Educational only, not investment, tax or legal advice. Tax Free Wealth Plan LLC is a licensed insurance agency, not a registered investment adviser or broker-dealer. Annuities are not bank deposits, are not FDIC insured and are not guaranteed by any government agency. Guarantees are backed solely by the claims-paying ability of the issuing insurance company. Features, rates and availability vary by state and change over time; the contract and disclosure documents govern.