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Work · May 21, 2026

Retirement Withdrawal Rate Calculator

Calculate withdrawal rate, needed portfolio size, income etc

What it does

The calculator helps with four related questions: • Surplus Calculator: "Given my situation, do I have extra money each year, or a shortfall?" • Needed Withdrawal Rate: "What withdrawal rate would exactly fund my spending?" • Needed Portfolio Size: "How much would I need to have invested to support this lifestyle?" • Needed Earned Income: "If I'm still working, how much W-2 income do I need?" All four calculators are on one tab so you can easily compare scenarios at a glance.

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    After having been a regular employee for years, I worked as a freelancer for a while. Going into my freelancing life I had no real mental model for how much of the money I earned was truly mine to spend, and how much of it I needed to set aside for taxes, vacations, retirement, and in case I got sick. I modelled this in Excel as best I could and was quite surprised both by how complicated it was to get right, and how much money I actually needed to set aside! As my girlfriend also started freelancing last year, I decided to turn my Excel sheet into a little program she could use too, and in…

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