Staying on top of your tax

You now understand the machinery: why we pay tax, how bands work, National Insurance, tax codes, PAYE versus self-assessment, reliefs, and how extra income is treated. This final lesson turns that understanding into a few simple habits.

First, know your deadlines. If any part of your income falls under self-assessment, there are fixed dates for filing and paying — and missing them usually means automatic penalties on top of the tax. Putting the key dates in your calendar, or letting mySal track them for you, removes the single most avoidable tax cost there is.

Second, keep simple records. You don't need an accountant's system — just somewhere consistent for payslips, and for the self-employed, invoices and expense receipts. This is where mySal's document hub and payslip scanning quietly pay off: your figures are captured as you go rather than scrambled for at year-end.

Third, check things once a year. Glance at your tax code, confirm you've claimed reliefs you're entitled to, and make sure you've set aside enough for any self-assessment bill. A single yearly review catches wrong codes, missed refunds and looming bills while there's still time to act.

Where to go next. If you earn any income outside a single PAYE job, the Self-Employed & Business track builds directly on this — expenses, VAT, invoicing and setting tax aside.