Income Replacement Ratio Calculator
Retirement income as a percentage of pre-retirement income.
Calculate the replacement ratio between your pre-retirement income and expected retirement income — what percentage of your wage your pension recreates.
What this tool does
This calculator computes your income replacement ratio—the percentage of pre-retirement income that your retirement income represents. Enter your gross (or net) pre-retirement income and your expected gross (or net) retirement income, and the tool calculates the ratio and positions it against common adequacy benchmarks, typically 70–85%. The result illustrates how your planned retirement income compares to your working years' earnings. Both inputs should use the same measurement approach (both gross or both net) for an accurate comparison. This calculation assumes your retirement income figure is already determined and does not account for inflation, taxation changes, investment growth, or other evolving financial factors. The output is for educational illustration and helps frame retirement income planning conversations.
Enter Values
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Formula Used
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Calculations or display — let us know.
Disclaimer
Results are estimates for educational purposes only. They do not constitute financial advice. Consult a qualified professional before making financial decisions.
60,000 pre-retirement income dropping to 45,000 in retirement is a 75% replacement ratio — squarely in the healthy zone. Retirees need less because commute costs disappear, mortgages often end, and working-age expenses (professional clothes, work lunches, childcare) stop.
What the result means
Primary is the replacement ratio. Below 60% usually means significant lifestyle adjustment; 70-85% maintains lifestyle; 100%+ is often unnecessary (retirees typically spend less).
Why 70-85%?
Post-retirement, many expenses drop: commuting, work clothes, work-related food. Mortgage often paid off. Pension contributions no longer needed (already accumulated). Holidays and healthcare may rise, but net typically 15-30% less is enough. 70% is the commonly-cited floor for comfortable retirement.
Quick example
With pre-retirement income of 60,000 and retirement income of 45,000, the result is 75.00%. Change any figure and watch the output shift — it's often more useful to see the pattern than to memorise the formula.
Which inputs matter most
You enter Pre-Retirement Income and Retirement Income. Not every input has equal weight. Adjusting one input at a time toward extreme values shows which ones move the result most.
What's happening under the hood
Simple ratio: retirement income divided by pre-retirement income, expressed as a percentage. Both figures should be gross or both net — don't mix. The formula is listed in full below. If the number looks off, you can retrace the calculation by hand — that's the point of showing the working.
The annual review habit
Plug new numbers in every year. Income changes, expenses shift, markets move. A plan that isn't revisited quietly drifts out of date. This tool is cheap to re-run — so re-run it.
What this doesn't capture
Real plans get re-run against new information every year or two. The result here is a reasonable direction, not a destination. It is a starting point for thinking, not a commitment to a specific future.
Your retirement income of £45,000 represents 75.00% of your pre-retirement income of £60,000.
Inputs
This example uses typical values for illustration. Adjust the inputs above to match a specific situation and see how the result changes.
Sources & Methodology
Methodology
This calculator computes the income replacement ratio by dividing your projected retirement income by your pre-retirement income, then multiplying by 100 to express the result as a percentage. The calculation models a straightforward comparison between these two income levels, assuming both figures are stated on the same basis—either both gross or both net of tax and deductions. The ratio does not account for changes in living costs, tax treatment differences between working and retirement years, inflation, or shifts in spending patterns. It also does not model one-time expenses, healthcare costs, longevity risk, or investment returns. The result represents only the proportional relationship between the two income figures at the point in time they are measured.
Frequently Asked Questions
What's the target ratio?
Gross or net?
Does this include state pension?
What's a realistic retirement income?
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