What is the Savings Rate?
Your savings rate — the share of take-home income you do not spend — is the single strongest predictor of how long you must work. It matters more than income, because it simultaneously builds your corpus and lowers the corpus you need.
Someone saving 50% reaches independence in roughly 17 years regardless of whether they earn $50,000 or $500,000. Someone saving 10% takes over 40 years at any income.
Formula & worked example
Target corpus = Annual expenses / withdrawal rate
Years = time for corpus to reach target at your return
Worked example: $90,000 take-home with $54,000 of expenses means saving $36,000 — a 40% savings rate. The target corpus at a 4% withdrawal rate is $1.35 million. Starting from $120,000 at a 5% real return, independence arrives in about 19 years.
How to use this savings rate calculator
- Use take-home income, after tax and retirement deductions you cannot access.
- Enter honest annual expenses, including irregular ones divided across the year.
- Use a real return (after inflation) — around 5% for an equity-heavy portfolio.
- Read the table to see how each 10% change in savings rate shifts your timeline.
Smart tips
- Cutting expenses is doubly powerful: it raises savings and reduces the corpus you need.
- Every 10 percentage points added to your savings rate typically cuts 5–10 years from the timeline.
- A raise only helps if you save it. Lifestyle inflation is what keeps high earners working.
- Use real returns with today's expense figures — mixing nominal returns with current costs badly overstates progress.
- Housing and transport are the two categories where large, permanent savings are actually achievable.
Frequently asked questions
What is a good savings rate?
20% is solid, 30–40% is strong, and 50%+ puts financial independence within roughly 17 years. Under 10% implies a very long working life.
Why does savings rate matter more than income?
Because it determines both how fast you accumulate and how much you need. A high earner who spends everything is no closer to independence than a low earner who does.
Should I use gross or net income?
Net (take-home). Gross includes tax you never receive, which overstates your true savings rate.
What return should I assume?
A real return of 4–6% after inflation is reasonable for an equity-heavy portfolio over decades.
Want the theory behind the numbers? Read our FIRE guides on the Money Blog.
Written by Gurjeet Singh, Sharpen Solutions. Last reviewed 8 Sep 2026. How we check these numbers.