Stretch Annuity Calculator

Estimate how long savings can fund payouts. Choose fixed, percent, or factor-based withdrawals with ease. View detailed schedules, then export CSV or PDF quickly.

Calculator

Example: 250000
Can be negative for down years.
Used to compute effective annual growth.
Pick a method, then fill its fields.
Stops early if balance reaches zero.
Timing affects growth and results.
Used when fixed amount is selected.
Used when percentage method is selected.
Withdrawal ≈ balance ÷ factor.
Common “stretch” simplification.
Applies to fixed withdrawals only.
Used to show after‑tax withdrawals.

Example data table

Scenario Starting balance Return Method Withdrawal Year‑1 ending
Fixed payout 250,000 6.5% Fixed 12,000 254,250
Percent payout 250,000 6.5% Percent 4% 260,400
Factor payout 250,000 6.5% Factor ÷45 260,000
Example rows are illustrative and rounded for readability.

Formula used

Effective annual growth
reff = (1 + r/m)m − 1
r = annual return, m = compounding periods per year.
Annual growth
Growth = Balance × reff
Withdrawals
  • Fixed: Wy = W0(1 + i)y−1
  • Percent: Wy = p × Balance
  • Factor: Wy = Balance ÷ Factor
i = inflation rate, p = percent rate. If factor decline is enabled, Factor decreases by 1 each year until 1.
After‑tax withdrawal
AfterTax = Withdrawal × (1 − t)
t = tax rate estimate.

How to use this calculator

  1. Enter your starting balance and annual return.
  2. Select compounding to match your assumption.
  3. Choose a withdrawal method and fill its fields.
  4. Set years to model and withdrawal timing.
  5. Add inflation and a tax estimate if needed.
  6. Press Calculate to view the schedule and totals.
  7. Use CSV or PDF buttons to save the results.

Stretch annuity guide

1) Understanding a stretch annuity plan

A stretch annuity approach spreads withdrawals across decades so the account can keep compounding while funding cash flow. This calculator models year-by-year balances, showing how withdrawals and returns interact. It is often used to explore retirement distribution pacing and portfolio longevity. Use it to compare pacing strategies before selecting a rule.

2) Inputs that shape the projection

Enter opening balance, expected return, and compounding frequency. Choose a method, years, and withdrawal timing. Add inflation to grow fixed withdrawals, and a tax rate to estimate net cash received. Use conservative returns to stress-test plans and see failure points.

3) Effective annual rate and compounding

With monthly or daily compounding, the tool converts nominal return to an effective annual rate: reff = (1 + r/m)m − 1. A 6.5% nominal rate compounded monthly becomes slightly higher than annual, improving long-range projections. Because the schedule runs annually, reff keeps year steps consistent.

4) Fixed withdrawals with inflation

Fixed withdrawals are predictable: set an annual amount and optionally increase it by inflation. At 2.5% inflation, 12,000 becomes about 12,300 in year two and keeps rising. Higher inflation adjustments increase realism but can shorten longevity. Try toggling inflation to see how purchasing power changes over time.

5) Percentage withdrawals and sustainability

Percentage withdrawals take a share of the balance, such as 4%. When the balance grows, withdrawals rise; in weak years, they fall automatically. This can reduce depletion risk, but income may vary year to year. Many planners test 3% to 5% as a quick benchmark.

6) Factor-based withdrawals and life factors

Factor-based withdrawals divide the balance by a factor, such as 45. Larger factors mean smaller withdrawals and a longer stretch. If you enable factor decline by 1 per year, payouts generally increase as the modeled horizon shortens. Choose a factor that matches your expected remaining years and goals closely.

7) Timing, taxes, and net cash flow

Start-of-year withdrawals reduce the amount that earns growth, while end-of-year withdrawals let funds compound first. Taxes are applied to withdrawals to estimate after-tax cash flow. Use the after-tax column for budgeting and scenario comparisons.

8) Reading the schedule and using exports

Each row shows beginning balance, growth, withdrawal, after-tax cash, and ending balance. The model stops early if the balance reaches near zero. Export CSV for spreadsheets or PDF for a shareable table of results.

FAQs

1) What does “stretch” mean here?

It means spreading withdrawals across many years to reduce early drawdowns and give the remaining balance more time to grow. The goal is longer-lasting payouts, not a guaranteed outcome.

2) Which withdrawal method is best?

It depends on your goals. Fixed withdrawals are predictable, percentage withdrawals adapt to performance, and factor withdrawals scale with the remaining horizon. Try multiple scenarios and compare years modeled, total withdrawals, and ending balance.

3) Why does withdrawal timing change results?

If you withdraw at the start of the year, less money earns returns for that year. Withdrawing at the end lets the balance compound first, often producing a higher ending balance under the same other inputs.

4) How should I choose the compounding frequency?

Pick the frequency that matches your assumption for returns. Monthly is common for planning because it approximates periodic growth, while annual is simpler. The calculator converts your inputs into an effective annual rate for consistent yearly steps.

5) Does the tax rate represent all taxes?

No, it is an estimate applied to withdrawals to show net cash flow. Real outcomes can differ due to brackets, credits, and account type. Use the rate that best matches your expected average tax on distributions.

6) What happens if returns are negative?

The model allows negative annual returns. A negative return reduces the balance before withdrawals, which can accelerate depletion under fixed spending. Consider testing both optimistic and conservative return assumptions to understand risk.

7) Can this replace professional planning?

No. It is a scenario tool for exploring how assumptions interact. Use it to prepare questions, compare strategies, and organize outputs, then confirm decisions with a qualified advisor for your jurisdiction.

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