Monthly gross salary
Gross pay from a separate salaried job producing the same additional take-home, keeping your other income and tax settings. Employee NI is calculated for that job separately. Before personal pension payments; no student loans. Daily equivalent = annual salary ÷ 260 working days.
Where the money goes
| In GBP | Daily¹ | Weekly² | Monthly | Annual |
|---|
¹ Per trading day. ² Annual ÷ 52, including time off. Monthly = annual ÷ 12. Tax is calculated annually, then allocated across these periods.
How it works, tax assumptions & sources
A steady-state annual planning estimate using 2026/27 rules (6 April 2026–5 April 2027), not a calculation of your remaining tax year or tax return. Enter an average profit, not a daily target or just winning days. Returns and payouts are not guaranteed.
- Annual GBP profit = daily USD profit × GBP per dollar × trading days per week × trading weeks per year × your share. Enter profit after allowable expenses; no additional £1,000 trading allowance is applied.
- Income Tax uses 2026/27 regional bands, the £12,570 standard Personal Allowance and its £1-for-£2 taper above £100,000 adjusted net income. The allowance is allocated across income types to minimise estimated tax. Savings include the starting rate and Personal Savings Allowance; dividends include the £500 allowance and 2026/27 rates of 10.75%, 35.75% and 39.35%.
- Self-employed NI uses Class 4: 6% between £12,570 and £50,270 and 2% above. Voluntary Class 2 is excluded.
- Salary comparison finds additional gross salary yielding the same incremental net income, retaining other income and reliefs. Employee NI uses annual thresholds for a separate job. Employer NI, workplace pension deductions and paid-leave benefits are excluded.
- Other income is retained in both scenarios. Trading tax is total Income Tax with trading minus Income Tax without trading, including effects on savings and dividend tax. Class 4 NI uses combined self-employed profits, less NI on other self-employed profits alone. Combined Class 1/Class 4 annual limits are not modelled.
- Relief-at-source pension contributions are grossed up by 1.25 and adjust tax bands and adjusted net income. Pension eligibility, earnings limits and annual allowance charges are not checked. Cash contributions are not deducted from the displayed trading take-home. Additional Personal Allowance is added after the standard allowance taper; it is not a tax-code override or Marriage Allowance calculation.
- Prop-firm income classification depends on your contract and circumstances. Self-employment is a planning assumption to confirm with a tax adviser. Own-account investing, capital gains and spread betting need different treatment and are not modelled here.
- Losses show zero current tax/NI; loss relief and carry-forward are not modelled. Negative take-home has no salary equivalent. Self Assessment payments on account may affect cash timing; they are not extra tax and are not included in the reserve.
Rates checked 29 October 2026. This version does not automatically update tax rules.