Deferred Annuity Calculator
A deferred annuity grows tax-deferred during an accumulation phase, then pays out income during a withdrawal phase. Enter your initial deposit, any regular contributions, the deferral length, and your expected rates of return to see your projected balance at payout, how much you can withdraw each period, or how long a given withdrawal will last. The year-by-year growth chart and schedule show exactly how your money compounds.
What is a deferred annuity?
A deferred annuity is an insurance contract that splits into two distinct phases. During the accumulation phase you deposit money (a lump sum, regular contributions, or both) and the balance grows at a credited or investment rate, typically tax-deferred. No income tax is owed on the growth until you take withdrawals. During the payout phase the accumulated balance is converted to a stream of income payments that can last for a fixed number of years or for your lifetime. The "deferred" part simply means income starts in the future rather than immediately, which distinguishes this product from an immediate annuity.
How the two-phase calculation works
The accumulation phase applies compound interest to your lump sum and any periodic contributions over the deferral period. The calculator uses monthly compounding internally regardless of contribution frequency, which is the most common convention for fixed and fixed-indexed products. Once the deferral period ends, the resulting balance becomes the starting balance for the payout phase. In "payout amount" mode, the calculator solves for the equal payment that would fully deplete the balance over the chosen term using a standard present-value-of-annuity formula. In "payout duration" mode it solves for how many periods a fixed withdrawal can continue before the balance reaches zero using the inverse of that formula. The payout phase applies its own interest rate (which may differ from the accumulation rate) to the remaining balance each period.
Accumulation rate vs. payout rate
Most annuity calculators use a single rate throughout, but real products often credit different rates in each phase. During the accumulation phase, fixed-rate and multi-year guaranteed annuities declare a specific crediting rate for the contract term, while fixed-indexed products link growth to a market index with a floor (commonly 0%) and a cap or participation rate. During the payout phase, the insurer may apply a different rate when calculating the annuity factor that determines income payments. Variable annuities use the actual sub-account return in both phases. This calculator lets you set separate rates for each phase so you can model realistic product structures. As a starting point, many planners use 4 to 6 percent for accumulation and 3 to 5 percent for payout.
Tax treatment and surrender charges
Growth inside a non-qualified (personal, after-tax) deferred annuity is tax-deferred but not tax-free. When you take withdrawals, the IRS treats earnings as coming out first (LIFO basis), so the entire interest portion is taxable as ordinary income. The optional tax-bracket field in this calculator estimates the tax on accumulated interest to show a post-tax balance, which is most relevant for non-qualified annuities where you have already paid tax on the principal. Qualified annuities (held inside an IRA or 401(k)) are funded with pre-tax dollars, so the full withdrawal is taxable. In addition, most products carry surrender charges - typically 7 to 10 years long - that apply if you withdraw more than the annual free-withdrawal allowance (commonly 10%) before the surrender period ends. This calculator does not model surrender charges; always check the contract.
Common deferred annuity types
| Type | Rate structure | Risk bearer | Best for |
|---|---|---|---|
| Fixed deferred | Guaranteed declared rate | Insurer | Capital preservation, predictable growth |
| Fixed indexed (FIA) | Linked to index (e.g. S&P 500), floor at 0% | Shared (cap/floor) | Upside potential with downside protection |
| Multi-year guaranteed (MYGA) | Locked rate for contract term (2-10 yrs) | Insurer | CD alternative, rate certainty |
| Variable deferred | Based on sub-account performance | Owner | Long-horizon growth, accepts volatility |
| Deferred income (DIA) | Fixed; longevity-insurance pricing | Insurer | Maximizing future lifetime income guarantee |
Deferred annuities differ in how interest is credited and who bears the investment risk. The type affects the rate you enter above.
Frequently asked questions
What is the difference between a deferred annuity and an immediate annuity?
An immediate annuity converts a lump sum into income payments that start within one month of purchase - there is no accumulation phase. A deferred annuity delays income to a future date, allowing the balance to compound during the deferral period. If you need income now, choose immediate; if you are still saving and want the money to grow first, deferred is the structure.
What interest rate should I use for the accumulation phase?
For a fixed or multi-year guaranteed (MYGA) annuity, use the declared annual rate on the contract or quote sheet. For a fixed-indexed annuity, a conservative assumption is 4 to 6 percent, acknowledging that the actual return depends on index performance, cap rates, and participation rates. For a variable annuity, use your expected net return after fund fees. Avoid using historic stock market averages for a fixed product and do not ignore annual fees, which reduce the effective rate.
Can I withdraw money during the accumulation (deferral) phase?
Most contracts allow annual free withdrawals of up to 10 percent of the account value without a surrender charge. Withdrawals above that threshold during the surrender period trigger surrender charges that can range from 1 to 10 percent of the amount withdrawn. Withdrawals before age 59.5 also incur a 10 percent IRS penalty on the earnings portion, on top of ordinary income tax. This calculator models a clean two-phase structure and does not factor in early-withdrawal penalties or surrender charges.
How is the periodic withdrawal amount calculated?
The payout formula is: Payment = Balance x r / (1 - (1 + r)^-n), where r is the periodic interest rate for the payout phase and n is the total number of payout periods. This is the standard present-value-of-annuity formula rearranged to solve for the payment. It produces the equal payment amount that will reduce the balance to exactly zero after n periods, assuming the interest rate stays constant.
What does "payout duration" mode calculate?
In duration mode you enter a desired periodic withdrawal and the calculator solves for how many years the accumulated balance will last. The formula used is: n = -ln(1 - Balance x r / Payment) / ln(1 + r), where r is the payout phase periodic rate. If the result is "Infinity" it means the interest earned each period equals or exceeds the withdrawal, so the fund never depletes - which is a strong position to be in.
Does this calculator account for inflation?
Not directly. To approximate inflation impact, reduce your expected rate of return by the expected inflation rate to get a "real" rate. For example, if you expect 5 percent crediting and 3 percent inflation, using 2 percent as the rate gives results in today's purchasing power. Alternatively, compare the total withdrawal sum to today's equivalent to see how far inflation erodes fixed payments over a long payout term.
Is a deferred annuity right for me?
Deferred annuities suit savers who have already maxed out tax-advantaged accounts (401(k), IRA) and want additional tax-deferred growth, or those who want a guaranteed income stream in retirement without managing investments. They are less suitable for investors who need liquidity, those in a low tax bracket where tax deferral is less valuable, or anyone who would do better with a lower-cost taxable investment account. Talk to a licensed insurance agent or fee-only financial planner before purchasing.