What is the Part-Time Work Break-Even Calculator?
The Part-Time Work Break-Even Calculator helps you compare staying in full-time work versus switching to part-time work earlier, and understand when the part-time path financially catches up. It shows the trade-off between income, pension growth, total days worked and overall wellbeing across your working life.
How the Calculator Works?
This calculator models two parallel paths from today until the end of your working life.
The full-time path assumes you continue working full-time, earning a higher income, making larger pension contributions and accumulating wealth more quickly.
The part-time path assumes you intentionally step down from full-time work, accepting lower income and slower pension growth in exchange for fewer working days, reduced burnout risk and improved work-life balance.
Both paths are taxed using current UK income tax and National Insurance rules. The calculator tracks net income, pension growth, cumulative earnings and cumulative days worked year by year. It then identifies the break-even age, where the part-time path catches up financially with the full-time path.
Crucially, this is not about working part-time as well as full-time. It models part-time work as a replacement for full-time work, showing how you rebalance money and life across your remaining working years.
Step One: Define Your Full-Time Baseline
Enter your current income, pension contributions and working pattern to establish the full-time path.
Step Two: Set Your Part-Time Plan
Choose how many days per week you would work, expected pay, and pension contributions under a part-time arrangement.
Step Three: Compare Outcomes Over Time
Review cumulative earnings, pension pots, days worked and wellbeing indicators to see when and if the part-time path breaks even.
Disclaimer: This calculator provides illustrative projections only and does not constitute financial, tax or career advice. Income, tax rules, pension returns and health outcomes vary. Use this tool as a decision-support aid rather than a guarantee of results.
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Traditional retirement is broken. Understand how our calculator enables you to live a better life now vs later.
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What is the Part-Time Work Break-Even Calculator?
It is a UK-specific tool that compares full-time and part-time work paths to show when reduced hours catch up financially and how working patterns affect money, time and wellbeing.
Is this modelling a part-time job on top of full-time work?
No. The calculator assumes part-time work replaces full-time work. It is designed to show how stepping back earlier affects both finances and life.
What does “break-even age” mean?
The break-even age is the point at which the total wealth from the part-time path catches up with the full-time path, despite lower earnings earlier on.
Why might part-time work still make sense if it delays break-even?
Because money is not the only constraint. Fewer working days, lower stress and better health can materially improve quality of life long before traditional retirement.
How are tax and National Insurance handled?
The calculator applies UK income tax and employee National Insurance rules to both paths to calculate net income accurately.
Does this include pension growth?
Yes. Pension contributions and growth are tracked separately for both paths, showing how reduced contributions affect long-term outcomes.
What are the health and burnout factors?
These are illustrative indicators that reflect how reduced working hours can lower burnout risk and slow health decline. They are not medical assessments.
What does “days worked” show?
It shows how many days you work each year and cumulatively across your career, highlighting the true time cost of staying full-time longer.
Can I export the results?
Yes. You can download a CSV file with the full year-by-year comparison, including earnings, pensions, days worked and wellbeing scores.
Is my data stored?
No. All calculations run locally in your browser and no personal data is saved.