Contract Comparison Calculator (Two Rates)
Compare two contract offers on take-home pay, even across different statuses – inside IR35, outside IR35 or umbrella – after expenses and pension.
Contract B nets more
£8,700
Contract A — net income£46,111
Contract A — effective rate23.1%
Contract B — net income£54,811
Contract B — effective rate26.9%
Difference (B - A)£8,700
Comparing two contract offers properly, even across different statuses
Two contract offers rarely sit on a level playing field — one might be inside IR35 via an agency, the other outside IR35 through your own limited company, or one paid through an umbrella with a different margin to the other. Comparing the headline day rates alone can be actively misleading once tax treatment, expenses and pension contributions are factored in.
What this comparison includes
- Independent status selection for each offer — umbrella, inside IR35 or outside IR35 — so you can compare, for example, an inside-IR35 role against an outside-IR35 one on equal footing
- Day or hourly rate, billable days and any umbrella margin specific to each offer
- Pension contributions and expenses modelled separately for each contract
- A single net income figure per month for each offer, rather than two gross rates that aren't directly comparable
