Retirement income rarely comes from one source; it arrives as a patchwork — portfolio withdrawals here, Social Security there, maybe a pension or a few shifts of part-time work. This calculator stitches the patchwork into a single monthly figure. It converts your Retirement Savings into Monthly Portfolio Income at your Annual Withdrawal Rate, then layers on Social Security (Monthly), Pension (Monthly), and Part-Time Income (Monthly) for the Total Monthly Income and Total Annual Income. It even sketches the tax bite, estimating Taxable Income and an Estimated Annual Tax so the gross does not mislead you.

With $800,000 saved at a 4% withdrawal rate, the portfolio yields about $2,667 monthly. Add $1,800 in Social Security and $1,000 of part-time income and you are at roughly $5,467 a month — $65,600 a year. The tax estimate then trims that to spendable reality, since withdrawals and part-time earnings are taxable even when Social Security is only partially so.

Build the patchwork deliberately. Each added stream — especially guaranteed ones like Social Security — lets you withdraw less from the portfolio, and every un-withdrawn dollar keeps compounding for your later self.

With the pre-filled defaults — Retirement Savings $800,000, Annual Withdrawal Rate 4%, Social Security (Monthly) $1,800, Pension (Monthly) $0, Part-Time Income (Monthly) $0 — the Retirement Income Calculator returns Portfolio Monthly Income $2,666.67, Total Monthly Income $4,466.67, Total Annual Income $53,600.00, Estimated Taxable Income $32,000.00, Estimated Annual Tax $4,800.00. Change any input and those results update instantly, so you can see exactly how each number you enter moves the answer.