The single premium deferred annuity, plainly.
One lump sum in, growth that isn't taxed until you touch it, income whenever you decide to start. Simple in shape — with three details that decide whether it's right.
What it is
A single premium deferred annuity — SPDA — takes one lump sum, grows it tax-deferred, and lets you convert it into income at a date you choose later. "Single premium" means one payment in. "Deferred" means income starts later, not now.
The contrast is the SPIA, a single premium immediate annuity, which starts paying within a year. Same lump sum, opposite timing. The deferred version is a savings vehicle that can become income; the immediate version is income from day one.
SPDAs come in fixed, indexed, and variable flavours — the "SPDA" label describes how it's funded and when it pays, not how it earns. A MYGA is the most common fixed version.
The tax part, which is the point
Growth inside a deferred annuity isn't taxed while it stays inside. No annual 1099 for gains you haven't taken. That's the core appeal for people who've already filled their 401(k) and IRA space.
Three consequences worth understanding before you buy:
- Withdrawals from a non-qualified annuity come out gains first, taxed as ordinary income — not capital gains
- Withdrawals before 59½ generally carry a 10% federal penalty on the taxable portion, on top of income tax
- Heirs do not get a step-up in basis on a non-qualified annuity, unlike most taxable investments
That third point matters more than it gets credit for. If a large legacy is the goal, deferring gains into an annuity can hand your heirs a tax bill that a taxable brokerage account wouldn't have. Worth a conversation with a tax professional before committing a large sum.
Putting an SPDA inside an IRA is a separate question. The tax deferral is already there from the IRA, so you're buying the annuity for its guarantees alone — which can be a legitimate reason, but "tax deferral" isn't one of them.
Pros and cons, both halves
Where it works
- Retirement accounts already maxed and you want more deferral
- You want a known rate without market exposure
- No contribution limits, unlike an IRA or 401(k)
- You can convert to lifetime income later without a new purchase
Where it doesn't
- Surrender charges typically run several years
- Gains taxed as ordinary income, not capital gains
- No step-up in basis for heirs
- Free withdrawals usually capped around 10% a year
- The 10% penalty before 59½
How an SPDA actually works, step by step
A single premium deferred annuity has two phases and one decision point between them, and understanding that shape explains most of the contract.
The accumulation phase. You make a one-time lump sum payment — the single premium — and the carrier credits a fixed rate of interest that compounds without annual taxation. On a MYGA-style contract, that fixed rate is guaranteed for the full term. On other deferred annuities the rate is declared periodically, subject to a guaranteed minimum stated in the contract. Guaranteed growth at a known rate is the entire appeal of this phase.
The decision point. When the term ends, you choose: withdraw the money, exchange it into another contract, let it renew, or convert it to income. Nothing forces you to annuitize, which is the single most common misconception about deferred annuities.
The payout phase. If you do convert, you begin receiving payments. Payout options generally include a fixed period, single life, or joint life with a surviving spouse. Once elected, the choice is usually irrevocable, which is why it warrants more thought than it typically gets.
The numbers to pull from your contract
Four figures determine what an SPDA is worth to you, and all four are in the paperwork.
The guaranteed interest rate and the term it applies to. These are two numbers, not one. A rate guaranteed for one year on a seven-year surrender period is a very different contract from one guaranteed for all seven.
The guaranteed minimum. The floor the carrier can drop to at renewal. Frequently far below the initial rate, and it defines your worst case if you hold past the guarantee.
The surrender period and schedule. How long, and the charge by year. Confirm whether the surrender period matches the rate guarantee — on some contracts the lockup outlasts the rate, which is a structural mismatch worth catching.
The free withdrawal allowance. How much you can take annually without a surrender charge, commonly around 10%, and whether it is available in year one.
Where the SPDA sits among retirement savings
An SPDA is a place to park a lump sum for guaranteed growth over a defined period. That is a narrow job and it does it well. It is not a growth vehicle, and money that needs to outpace inflation over thirty years is generally better served elsewhere.
The typical fit is money with a known horizon and no tolerance for loss: proceeds from a property sale, a maturing CD, an inheritance you want to preserve, or the conservative portion of a retirement portfolio. If you want income later, the option to convert is there. If you want the sum payment back at the end of the term, that works too.
Next questions.
This page is educational and general. It is not a recommendation, and it is not tax or legal advice. Contract terms vary by carrier, product, and state. Annuity guarantees depend on the financial strength and claims-paying ability of the issuing insurer. Read your own contract, or bring it to us and we'll read it with you.
Single premium vs flexible premium: which one you actually need
The word single in a single premium deferred annuity is doing real work: the contract is funded once, at issue, and no further deposits are accepted. Its counterpart, the flexible premium deferred annuity (FPDA), accepts ongoing contributions — monthly payroll deferrals, annual additions, irregular deposits — into the same contract over time.
The choice follows the money, not the product's merits. A rollover, an inheritance, a property sale, or a maturing CD is a single event, and an SPDA matches it: one premium, one rate, one guarantee period, one surrender schedule with a known end date. Ongoing savings out of income are a stream, and a stream needs an FPDA — or, in employer plans, the flexible contracts that populate 403(b) menus, where payroll contributions are the entire point.
Two mechanical differences deserve attention before signing either. Rate treatment: an SPDA locks one guaranteed rate on the full premium for the term, while an FPDA typically credits each new contribution at whatever rate is current when it arrives — so your effective yield is a moving average you never quite control. Surrender timing: an SPDA's schedule runs from a single issue date and expires cleanly, while some flexible contracts start a new surrender period on each deposit, meaning the money you added in year six may still be locked in year eleven. Ask which convention the contract uses, in writing, before making the second deposit — the answer determines whether you own one annuity or a stack of overlapping ones.
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