Annuity Accumulation Calculator: Growth During the Accumulation Phase
Work out what a deferred annuity grows to during its accumulation phase — from an initial premium plus any ongoing contributions, compounding at the credited rate — before it converts to income.
Adjust the inputs and select Calculate for a full breakdown.
Year-by-year growth schedule
Compare Common Scenarios
How the numbers shift across typical situations for this calculator:
| Scenario | Future value | Total contributions | Total interest earned |
|---|---|---|---|
| $20k + $400/mo · 5% · 10yr | $95,053.10 | $68,000.00 | $27,053.10 |
| $50k + $0/mo · 4% · 15yr (lump only) | $91,015.08 | $50,000.00 | $41,015.08 |
| $10k + $500/mo · 5% · 20yr | $232,643.24 | $130,000.00 | $102,643.24 |
| $100k + $0/mo · 4.5% · 10yr | $156,699.28 | $100,000.00 | $56,699.28 |
How This Calculator Works
Enter the initial premium, any monthly contribution, the credited annual rate, and the accumulation years. The calculator compounds the balance monthly and shows the accumulated value and how much is growth. This models the accumulation (saving) phase, not the later payout phase.
The Formula
Future Value with Regular Contributions
P = starting amount, PMT = monthly contribution, r = monthly rate (annual ÷ 12), n = number of months
Worked Example
A $20,000 premium plus $400 a month for 10 years at 5% accumulates to about $95,053 — with roughly $27,053 of growth. A deferred annuity has two phases: accumulation (your money grows tax-deferred, as modeled here) and annuitization (the balance converts to a stream of income payments). The appeal is tax-deferred growth and, eventually, the option of guaranteed lifetime income — but annuities are complex products with fees and surrender charges this simple projection doesn't capture.
Key Insight
This calculator shows the accumulation phase of a deferred annuity, but annuities are among the most complex and fee-laden financial products, so the clean compound curve hides a lot. Key cautions: annuities often carry significant fees (mortality and expense charges, administrative fees, and rider costs) that reduce the real credited return, and surrender charges can lock your money in for years with steep penalties for early withdrawal — so the liquidity is poor. The rate matters by type: a fixed annuity credits a set rate (closest to this model), while variable annuities depend on underlying investments (not guaranteed) and indexed annuities credit a capped/participation-limited share of an index — so a flat assumed rate oversimplifies both. The genuine benefits are tax-deferred growth (no annual tax on gains during accumulation) and the eventual option to convert to guaranteed lifetime income you can't outlive, which is valuable for some retirees. But for many savers, low-cost tax-advantaged accounts (401(k), IRA) offer tax-deferred growth without the fees and complexity, so annuities are best considered after maxing those, and only after understanding the specific contract's fees, surrender schedule, and guarantees. Treat this figure as a simplified accumulation estimate and read the actual contract closely before committing.
Annuity types + accumulation mechanics
FIXED ANNUITIES (Multi-Year Guaranteed Annuity / MYGA).
Substantial — substantial 3-7 year terms 2024.
Substantial — substantial guaranteed rate 3-5.5% common 2024.
Substantial — substantial high-rate environment substantial competitive.
Substantial — substantial similar to CDs but tax-deferred.
Substantial — substantial issued by insurance company.
FIXED INDEXED (FIA).
Substantial — substantial principal protected.
Substantial — substantial returns linked to index (S&P 500 typical).
Substantial — substantial cap 8-12%.
Substantial — substantial floor 0% (no losses).
Substantial — substantial participation rate 50-100%.
Substantial — substantial spread 1-3% deducted.
Substantial — substantial substantial substantial reset annually.
VARIABLE ANNUITIES.
Substantial — substantial subaccount investments (like mutual funds).
Substantial — substantial market risk substantial.
Substantial — substantial M&E fees 1-1.4%.
Substantial — substantial subaccount fees 0.5-1.5%.
Substantial — substantial substantial substantial high cost.
Substantial — substantial GMxB (Guaranteed Minimum) riders substantial.
REGISTERED INDEX-LINKED (RILA) / Buffer Annuities.
Substantial — substantial buffer (e.g., -10% buffer absorbs first 10% loss).
Substantial — substantial cap higher than FIA (12-18%).
Substantial — substantial newer product.
TAX TREATMENT.
Substantial — substantial tax-deferred growth.
Substantial — substantial gains ordinary income at distribution.
Substantial — substantial 10% IRS penalty <59½.
Substantial — substantial no contribution limits (vs IRAs).
Substantial — substantial 1035 exchange tax-free between policies.
Costs, surrender, comparison alternatives
FEES substantial.
M&E (Mortality & Expense). Substantial — substantial 1-1.4% annual variable annuities.
Admin fees. Substantial — substantial 0.15-0.30% annual.
Subaccount fees. Substantial — substantial 0.5-1.5% variable.
Rider fees. Substantial — substantial 0.5-1.5% optional.
Substantial — substantial total expense 2-4% variable annuities.
Substantial — substantial substantial substantial substantial.
Substantial — substantial fixed + FIA substantial lower (often 0-1%).
SURRENDER CHARGES substantial.
Substantial — substantial 5-10 year declining schedule.
Substantial — substantial 7-9% Year 1.
Substantial — substantial declining 1% per year.
Substantial — substantial 0% after surrender period.
Substantial — substantial substantial substantial.
MVA (Market Value Adjustment).
Substantial — substantial fixed annuity early withdrawal.
Substantial — substantial interest rate adjustment.
Substantial — substantial substantial substantial.
BONUS CREDITS.
Substantial — substantial 5-10% upfront bonus.
Substantial — substantial substantial trade-offs typically.
Substantial — substantial longer surrender period.
Substantial — substantial higher fees.
Substantial — substantial vesting schedule.
Substantial — substantial substantial scrutinize.
vs ROTH IRA.
Substantial — substantial Roth substantial cheaper.
Substantial — substantial $7K/yr limit (2024).
Substantial — substantial qualified withdrawals tax-free.
Substantial — substantial substantial substantial.
Substantial — substantial Roth substantial preferable substantial.
vs 401k.
Substantial — substantial 401k substantial employer match.
Substantial — substantial higher contribution limits ($23K).
Substantial — substantial substantial substantial cheaper.
WHEN annuities make sense.
(1) Substantial — substantial maxed other tax-advantaged.
(2) Substantial — substantial guaranteed lifetime income desired.
(3) Substantial — substantial principal protection.
(4) Substantial — substantial state creditor protection substantial.
(5) Substantial — substantial Section 1035 exchange existing.
Substantial — substantial substantial substantial substantial.
REGULATIONS substantial.
Substantial — substantial SEC for variable annuities.
Substantial — substantial state insurance commissions fixed + FIA.
Substantial — substantial NAIC suitability standards.
Substantial — substantial DOL fiduciary rule substantial.
Substantial — substantial substantial substantial substantial.
ILLUSTRATIONS substantial misleading.
Substantial — substantial historical lookbacks substantial sales tools.
Substantial — substantial future not guaranteed.
Substantial — substantial substantial substantial.
U.S. annuity accumulation benchmarks (2024)
Reference annuity types + rates.
| Type | Typical rate / feature |
|---|---|
| Fixed MYGA 3-year | 5-5.5% 2024 |
| Fixed MYGA 5-year | 5.5-6% 2024 |
| Fixed MYGA 7-year | 5.5-6.25% 2024 |
| FIA cap rate | 8-12% |
| FIA floor | 0% (no losses) |
| FIA participation rate | 50-100% |
| Variable annuity M&E | 1-1.4% |
| Variable subaccount fees | 0.5-1.5% |
| RILA / Buffer cap | 12-18% |
| Surrender charge Y1 | 7-9% |
| Bonus credits | 5-10% (with trade-offs) |
| Tax deferral | Yes (gains ordinary income) |
Annuities substantial complex — fees + surrender + tax + comparison alternatives. Variable substantial 2-4% total expense. Fixed + FIA substantial lower cost. Roth IRA + 401k substantial preferable typically. NAIC suitability standards + DOL fiduciary rule. 1035 exchange substantial tax-free transfers. NAIC + IRS + FINRA guidance.
Frequently Asked Questions
How is the annuity accumulation calculated?
The initial premium and each monthly contribution compound at the credited rate (annual rate ÷ 12 per month). $20,000 plus $400/month for 10 years at 5% accumulates to about $95,053, with roughly $27,053 of that being growth — before any fees.
What are the two phases of a deferred annuity?
Accumulation, where your money grows tax-deferred (modeled here), and annuitization (payout), where the accumulated balance converts to a stream of income payments. The appeal is tax-deferred growth and the eventual option of guaranteed lifetime income.
Does this account for annuity fees?
No — and that's a big caveat. Annuities often carry mortality and expense charges, administrative fees, and rider costs that reduce the real credited return, plus surrender charges for early withdrawal. The actual accumulated value can be meaningfully lower than this fee-free projection.
How does the rate depend on annuity type?
A fixed annuity credits a set rate (closest to this model). A variable annuity's return depends on underlying investments and isn't guaranteed. An indexed annuity credits a capped or participation-limited share of an index. A single flat rate oversimplifies variable and indexed products.
Are annuities a good way to save?
They offer tax-deferred growth and optional lifetime income, valuable for some retirees, but they're complex and fee-laden with poor liquidity (surrender charges). Many savers are better served first maxing low-cost tax-advantaged accounts (401(k), IRA). Consider an annuity only after understanding its specific fees, surrender schedule, and guarantees.
When is this calculator unreliable?
Less reliable when M&E fees (1-1.4%) + admin (0.15-0.30%) + subaccount (0.5-1.5%) + rider fees (0.5-1.5%) compound (variable annuity total 2-4%), when surrender charges 5-10 year typical declining schedule, when participation rate / spread / cap on indexed substantially reduce returns, when bonus credits with substantial trade-offs (longer surrender, higher fees, vesting), when MVA (market value adjustment) on fixed early withdrawal, or when tax deferral vs Roth IRA comparison (Roth substantial preferable typically).
References & Authoritative Sources
- National Association of Insurance Commissioners (NAIC) — Annuity Buyer's Guide · consulted June 1, 2026 · Industry regulator
- U.S. Internal Revenue Service (IRS) — Annuity Taxation — Pub 575 · consulted June 1, 2026 · Federal tax authority
- FINRA Investor Education — Annuity Education · consulted June 1, 2026 · Industry regulator
Related Calculators
Data Sources & Benchmarks
This calculator draws on 1 independent, dated source. The starting values for credited annual rate are taken from the benchmarks below and refresh whenever the snapshots are updated.
Methodology & Review
Annuity accumulation phase value = principal × (1 + r)^n + periodic contributions × ((1 + r)^n − 1) / r. Calculator returns future value at end of accumulation. U.S. deferred annuity types: fixed (3-5.5% guaranteed 2024); indexed (cap 8-12%, floor 0%); variable (subaccounts, market risk). Substantial fees + surrender charges + tax deferral. RELIABILITY: Reliable for documented contract terms. Less reliable when (a) M&E fees (1-1.4%) + admin fees (0.15-0.30%) + subaccount fees (0.5-1.5%) compound; (b) surrender charges 5-10 year typical declining schedule; (c) participation rate / spread / cap on indexed (substantial cap reduction); (d) bonus credits with substantial trade-offs; (e) MVA (market value adjustment) on fixed; (f) tax deferral vs Roth IRA comparison.
Updated