By profit
Self-employed profit of £125,000: what the tax looks like
The end of the Personal Allowance taper, a few pounds before the highest rates of Income Tax begin.
On £125,000 of profit, a sole trader in England, Wales or Northern Ireland owes £46,189 for 2026/27, £42,432 of Income Tax and £3,757 of Class 4, and keeps £78,811. A Scottish taxpayer owes £51,364. Only £70 of the Personal Allowance survives, because the taper has already removed the rest of the £12,570. It vanishes entirely at £125,140, just £140 further on, and that same figure is where the additional rate of 45 % begins in the rest of the UK and the top rate of 48 % in Scotland. This profit therefore sits at the very end of the dearest stretch of the system: the next pound still costs 62 % with Class 4, or 69.5 % in Scotland. Once the allowance is spent, the cost of a new pound actually falls, to 47 % and 50 %. A pension contribution large enough to bring adjusted net income down to £100,000 restores the whole allowance.
Self Assessment bill 2026/27
£46,189
Put aside 37.0 % of your profit · next £100 of profit costs 62.0 %
| Profit | £125,000 |
| Income Tax | £42,432 |
| Class 4 National Insurance | £3,757 |
| Class 2 | treated as paid |
| Kept from your profit | £78,811 |
When you pay, if 2026/27 is your first year
| 31 January 2028: bill + first payment on account | £69,283 |
| 31 July 2028: second payment on account | £23,094 |
Each payment on account is half of £46,189 (Income Tax and Class 4, loans excluded). How payments on account work
Making Tax Digital at this turnover
Turnover of £125,000 is over the £50,000 test. If your 2024/25 return showed income like this, quarterly updates start on 6 April 2026. Check your start date
Figures checked by Radif Partners · Editorial policy · How we calculate
£70 of allowance and no more
The taper has done almost all its work by this point. Each £2 of income over £100,000 has taken £1 away, and £25,000 of excess leaves £70. A barrister or a software contractor finishing the year here is paying higher-rate tax on almost every pound above the basic band, plus the tax on the allowance that has been clawed back. Bank interest or a dividend from a small shareholding counts towards adjusted net income too, so a modest amount of either on top of this profit would take the allowance the rest of the way. The table follows the same profit a little further, to show what happens once there is nothing left to withdraw.
| Profit | Allowance | Income Tax rUK | Next pound rUK | Income Tax Scotland | Next pound Scotland |
|---|---|---|---|---|---|
| £120,000 | £2,570 | £39,432 | 62 % | £44,232 | 69.5 % |
| £125,000 | £70 | £42,432 | 62 % | £47,607 | 69.5 % |
| £125,140 | £0 | £42,516 | 47 % | £47,702 | 50 % |
| £130,000 | £0 | £44,703 | 47 % | £50,034 | 50 % |
| £150,000 | £0 | £53,703 | 47 % | £59,634 | 50 % |
| £200,000 | £0 | £76,203 | 47 % | £83,634 | 50 % |
Into the additional rate
From £125,141 of taxable income, the rest of the UK charges 45 %. With the allowance already gone, that is also the profit figure, so the bands line up neatly with the end of the taper. The rate on new profit then drops from 62 % to 47 %, the additional rate plus 2 % Class 4, and stays there however high profit goes. Pension relief changes shape too: on income taxed at 45 %, the return gives back an extra 25 % on top of the basic relief claimed by the provider.
Scotland's 48 % band
Scotland uses the same £125,141 line for its top rate, so a Scottish sole trader goes straight from the advanced rate of 45 %, inflated by the taper, to 48 % on everything above. With Class 4 the next pound then costs 50 %. At £125,000 the Scottish bill is £51,364, £5,175 more than in the rest of the UK, and the gap keeps widening by 3 % of each further pound. The Scottish tax page has the full set of bands.
Recovering the allowance in one contribution
Because gross pension contributions come off adjusted net income, a contribution of £25,000 gross takes this profit back to £100,000, and the full £12,570 returns. In Scotland the same contribution cuts the bill from £51,364 to £39,489. Contributions only earn relief up to the amount of your earnings, and larger pension savings run into the annual allowance, a separate limit not modelled here. Without a contribution, a settled year at this level means instalments of £23,094 on 31 January 2028 and 31 July 2028. The taper calculator shows how other income mixes change the picture.