Promotion Salary Comparison

Model the true impact of a raise or promotion after tax, NI, pension and student loan — is it worth the extra responsibility?

Current salary

New salary

Pension %

Student loan

Gross raise

£10,000

+22.2%

Extra take-home

+£6,562

+£547/mo

Marginal rate on raise

34.4%

Tax + NI + SL + pension

You keep

65.6%

of every extra £1

Side-by-side breakdown

Item	Current	Promoted	Difference
Gross salary	£45,000	£55,000	+£10,000
Pension sacrifice	-£2,250	-£2,750	-£500
Income Tax	-£6,036	-£8,332	-£2,296
National Insurance	-£2,414	-£3,056	-£642
Take-home pay	£34,300	£40,862	+£6,562

Verdict

A £10,000 raise (22.2%) gives you £6,562 extra per year (£547/mo take-home).

Your marginal deduction rate on the raise is 34.4% — meaning you keep 66p of every extra £1.

Effective tax + NI rate moves from 18.8% to 20.7%.

⚠️ Illustrative projections only — not financial or legal advice. Consult a qualified adviser before making financial decisions.