Planning for Tax Payments Throughout the Year

Why a monthly habit beats a January scramble

For many owners of small professional practices, tax payments can feel like an unwelcome surprise. The good news is that this stress is almost entirely avoidable. By treating tax as a regular monthly commitment rather than a once-a-year emergency, you smooth out the peaks and protect your cash flow. The principle is simple: the money you owe to HMRC is not your money. It is merely passing through your account. Once you embrace that mindset, planning becomes far less painful.

Know your key UK tax deadlines

Different taxes have different rhythms, and missing a date can trigger penalties and interest. For sole traders and partners, Self Assessment is the main event. If you file online, your return and any balancing payment for the previous tax year are due by 31 January. On the same date, you usually make your first payment on account for the current year. A second payment on account follows by 31 July. The tax year itself ends on 5 April, which is also when many allowances reset.

If you operate through a limited company, Corporation Tax is normally payable nine months and one day after the end of your accounting period. VAT returns and payments are usually quarterly, with a deadline one month and seven days after the period end. PAYE and National Insurance for employees are monthly or quarterly.

• 31 January – Self Assessment return, balancing payment, first payment on account
• 31 July – Second payment on account for Self Assessment
• 5 April – End of tax year; review allowances and planning
• Quarterly – VAT returns and payments (if registered)
• Monthly or quarterly – PAYE and National Insurance
• Nine months and one day after year end – Corporation Tax

Work out a realistic monthly set-aside

Start by estimating your total tax liability for the year. Look at your last return and your projected profits. If your profits are steady, take last year’s bill, add a buffer of 10–20%, and divide by twelve. For example, if you expect to owe £15,000, aim to set aside £1,250 to £1,500 each month. If you are VAT registered, put aside the VAT element of every sale as it happens – often 20% of your standard-rated income – into a separate tax pot.

Open a dedicated savings or current account for tax. Set up a standing order from your business account to move the money on the same day each month. Treat it as a non-negotiable bill, like rent or wages. When a payment becomes due, transfer the required amount to HMRC. Any surplus stays in the pot as a buffer for next year. This simple automation removes willpower from the equation.

Make tax saving a team effort

You do not have to carry this alone. Collaboration is the secret weapon of well-run practices. If you have a practice manager, bookkeeper, or accountant, bring them into the process. Share your tax calendar and your monthly set-aside figure. Ask them to flag any changes in deadlines or liabilities. A five-minute monthly check-in can prevent a five-hour panic later.

Use cloud accounting software so that you and your adviser see the same real-time numbers. When you review your management accounts together, you can adjust your set-aside if profits rise or fall. Delegate the task of reconciling the tax pot to a trusted team member. The more eyes on the figures, the less likely a deadline will slip through the net.

Simple tools and routines that keep you on track

You do not need complex systems. A separate bank account, a standing order, and a shared online calendar are enough for most small practices. Set calendar alerts for two weeks before each deadline – that gives you time to gather documents or query a figure. Label a folder in your email or cloud storage for tax correspondence, so you are not hunting for a reference number at the last minute.

• Review your tax pot balance monthly against your expected liability
• Reconcile your set-aside after each quarter or significant invoice
• Keep a simple spreadsheet or accounting report showing profit to date
• Never use the tax pot for day-to-day expenses
• Share a one-page tax summary with your accountant each quarter

Avoiding the common pitfalls

The most common mistake is forgetting payments on account. Many people budget for the balancing payment but overlook the two advance instalments, which can double the January bill. Another pitfall is underestimating tax because you have not accounted for late invoices or a good month. If you invoice in March, the tax may not be due until the following January, but you should still set money aside as soon as the income arrives.

Mixing business and personal spending in the same account makes it almost impossible to know how much is truly yours. Keep them separate. And do not assume that a deadline falling on a weekend or bank holiday gives you extra time – HMRC usually requires payment by the next working day, but penalties can still apply if you miss the original date. When in doubt, pay early.

Finally, remember that tax planning is not about predicting the future perfectly. It is about building a steady, repeatable routine that removes fear from the process. Set aside monthly, track your deadlines, and collaborate with your team. Tax season then becomes just another part of running your practice – calm and controlled.