Is the Pay Rise Worth It?
Moving from £40,000 to £45,000 is a gross increase of £5,000. But after tax and NI, you actually take home £3,600 more per year — that's £300 extra per month.
You keep 72% of the pay rise. The rest goes to income tax and National Insurance.
Tax Band Impact
Both salaries fall within the basic rate tax band (20%). You keep a consistent 68p of every additional pound earned (after 20% tax and 12% NI). No tax cliff edges to worry about in this range.
What the Difference Means in Practice
An extra £300 per month could cover a significant boost to your savings rate or a better rental property. A difference of this size could come from an annual pay review, a promotion within the same role, or moving to a slightly larger organisation.
What Does the £5,000 Difference Mean?
Both salaries fall within the basic rate (20%) tax band. The entire £5,000 difference is taxed at 20% income tax plus 8% National Insurance, meaning you keep about 72p of every extra £1.
The £5,000 difference translates to roughly £300/month extra take home. While not transformative, this covers a car payment, additional savings contribution, or a noticeable improvement in discretionary spending.
Is the Jump Worth It?
When evaluating a pay rise from £40,000 to £45,000, consider the full picture: pension contributions (employer may contribute a percentage of the higher salary), student loan repayments (which increase with salary), and any changes in benefits or working conditions. A higher salary also increases your mortgage borrowing power — at 4.5x salary, the mortgage difference is £22,500. See the full breakdowns: £40,000 after tax and £45,000 after tax.
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Calculate your take home pay →See the full breakdown: £40,000 salary · £45,000 salary