Use the estimator below to get a rough idea of what you should set aside for tax. Then, if you want it accurate all year (with exports for your accountant), InstructorOS tracks your income and expenses automatically.

Enter your turnover and expenses. We’ll show your profit and a rough “tax pot” amount to set aside. (You can tweak the % to match your comfort level.)
Lessons income before expenses.
Fuel, insurance, repairs, training, etc.
This page is a quick estimate. InstructorOS keeps your numbers updated all year as you log lessons and expenses — then exports clean summaries for your accountant.
InstructorOS is designed around the real way ADIs work: lots of small transactions, unpredictable costs, and a constant need to know what you’re actually taking home.
Keep an eye on profit and tax buffer as you go — not just at year-end.
Fuel, repairs, insurance, training — tracked consistently in one place.
Built around Apr–Mar so you’re always looking at the correct period.
Know what to set aside so tax doesn’t nuke your month.
Export summaries your accountant can use without reformatting.
No formulas. No broken totals. No mess.
If you’re here for tax, you’ll probably want these too.
£15/month after your 7-day trial. Keep your numbers clean and your tax stress low.