SWP Calculator

Model periodic withdrawals and the resulting investment balance. Results are deterministic educational calculations—not financial, tax, legal or investment advice.

Calculate instantly

Result

Prepares a Chat draft with these inputs and this result. Nothing is shared with QELLY until you choose Send.

Worked example

The calculator opens with this registered example. Replace one assumption at a time to see how the deterministic result changes.

Example inputs

{
  "initialBalance": 2000000,
  "monthlyWithdrawal": 15000,
  "annualReturnPercent": 8,
  "months": 120
}

Example output

{
  "endingBalance": 1695089.941363818,
  "totalWithdrawn": 1800000,
  "monthsCompleted": 120,
  "depleted": false
}

Input glossary

Required inputs for this method: Initial Balance, Monthly Withdrawal, Annual return, Months. Validation boundaries below come from the registered calculator schema.

Initial Balance

Enter initial balance for this calculation.

Required · Unit: currency

Monthly Withdrawal

Enter monthly withdrawal for this calculation.

Required · Unit: currency

Annual return

Enter annual return percent for this calculation.

Required · Unit: %

Months

Enter months for this calculation.

Required · Unit: months

Assumptions and limits

Method: Systematic Withdrawal Plan · version 1.0.0 · formula ID swp-schedule.
The calculation uses only the values entered on this page; it does not silently fetch live market data.
Fees, taxes, liquidity, slippage and other costs are included only when the registered inputs explicitly model them.
Display locale and rounding can change presentation, not the underlying deterministic receipt.

Edge cases

Inputs outside registered validation rules return an error rather than a fabricated result.
Array, matrix or cash-flow fields must be valid JSON in the structure described by their input label.
Extreme assumptions can be mathematically valid but economically unrealistic; use them as sensitivity tests rather than forecasts.

Frequently asked questions

Does this calculator require an account?

No. It works publicly without login. Calculations run locally. Explain result prepares a local Chat draft; your inputs and result are shared with QELLY only if you choose Send.

Is the result a recommendation?

No. It is a deterministic formula receipt whose usefulness depends on the assumptions you enter.

Why can market outcomes differ?

Fees, taxes, liquidity, volatility, timing and future returns may differ from the model assumptions.

Can I share my inputs?

Yes. Share creates an optional URL fragment containing only the inputs you choose to share. The fragment is not sent to QELLY by the calculator page.