Choosing between two contract offers isn’t just about comparing day rates. Subtle differences in working patterns, IR35 status, and tax treatment can have a major impact on your take‑home pay. Our Contract Comparison Calculator brings all these factors together, delivering a clear, side‑by‑side evaluation of your potential earnings.
By entering each contract’s rate, billing frequency (hourly or daily), and IR35 status, you’ll instantly see both the annual and monthly net income for each option. The results include the absolute difference in pounds and the percentage uplift or shortfall, giving you the hard data you need to negotiate with confidence or decide which opportunity best fits your financial goals.
Getting started is simple: fill in the rate, select whether it’s an hourly or daily figure, choose the relevant IR35 classification for Contract A and Contract B, then click “Calculate.”
Contract Comparison Calculator
Compare net earnings of two contracts (with IR35).
Contract A
Contract B
Comparison Results
| Net Total A (£): | |
| Net Total B (£): | |
| Difference (£): | |
| Annual Difference (£/yr): | |
| Monthly Difference (£/mo): | |
| Percentage Difference: |
This calculator applies current UK tax rules to provide reliable estimates. For a comprehensive assessment that includes pension contributions, allowable expenses, or other deductions, we recommend consulting a qualified accountant.