How much should a small business set aside for tax?

There is no safe universal percentage. The right amount depends on business structure, VAT position, payroll, profit, director payments, payments on account and current tax rules. A cautious routine separates likely tax money from day-to-day working cash and reviews it with real figures.

Should VAT money be kept separate from trading cash?

Many owners find it safer to treat VAT collected as money that will be due to HMRC, not as spare cash. The exact routine should reflect the business VAT scheme, return cycle and cashflow pattern.

Can management accounts help with tax set-aside?

Yes. Management accounts can turn bookkeeping records into a practical view of profit, cash, tax liabilities and upcoming payment dates, helping the owner plan before a deadline arrives.

Cashflow and tax set-aside: stop treating every bank balance as spare money.

A business can look healthy on the bank app and still be walking into a VAT, PAYE, Corporation Tax or Self Assessment squeeze. The safer habit is to separate working cash from likely tax money before the deadline.

General guidance only — tax set-aside depends on structure, profit, VAT/payroll position, payment dates and current HMRC rules.

Short answer Monthly routine Common mistakes FAQs

Cash discipline

The short answer

Small-business owners need a simple way to see which cash is available for wages, stock, dividends, drawings and bills — and which cash is already likely to belong to HMRC or another commitment.

That does not mean guessing a tax figure once a year. It means keeping records current enough to review VAT, PAYE, Corporation Tax, Self Assessment payments on account, director loan movements and profit before the business makes another spending decision.

Practical rule: if a tax bill would hurt because the money has quietly been spent elsewhere, the business needs a clearer set-aside routine.

Why the bank balance can mislead

The current account usually mixes several different types of money: customer receipts, VAT collected, payroll deductions, supplier money, corporation-tax provision, owner pay, future costs and genuine surplus. Looking only at the headline balance can make a profitable business feel richer than it is.

This is where management accounts and a monthly bookkeeping routine help. They give the owner a view of profit and liabilities during the year, not just after accounts are prepared.

Monthly routine

A practical cash and tax set-aside rhythm.

1. Clean the records first

Reconcile bank activity, upload missing invoices and receipts, and mark personal or mixed-use items. A set-aside figure based on messy records is still guesswork.

2. Separate known commitments

List VAT, PAYE, pension, supplier, finance and rent commitments before treating the remaining balance as available cash.

3. Review profit and owner pay

For companies, check dividends, salary, director loan movements and retained profit before taking more money from the business.

Set-aside buckets

Different taxes create different cash pressures.

One generic savings percentage can be dangerous. The business structure and tax cycle decide what should be watched.

VATVAT collected from customers may need to be ring-fenced during the quarter, especially if pricing has not allowed for the payment.

Payroll and PAYEPAYE, National Insurance and pension payments are recurring cash commitments, not optional admin items.

Corporation TaxLimited companies need to plan from profit and year-end timing, not only from what is left in the bank after spending.

Self AssessmentSole traders, landlords, side-income earners and directors may have January/July payments on account that need planning well before the return is filed.

Common mistakes

Cash habits that create tax stress later.

Using VAT as working capital

VAT received can feel like extra income until the return is due. If it has funded day-to-day costs, the VAT deadline becomes a cashflow problem.

Taking dividends before checking profit

Dividends need enough distributable profit and sensible cash planning. The bank balance alone is not enough evidence.

Leaving payments on account too late

A January bill can include both the balancing payment and a payment on account for the next year. That catches many owners off guard.

Useful next reads

Build the cash routine into the wider accounts workflow.

Management accounts

Use monthly or quarterly reporting to connect bookkeeping, profit, tax set-aside and decisions.

See management accounts

Self Assessment payments

Understand why January and July payments can surprise owners who only plan for the tax return itself.

Read the payments guide

Bookkeeping checklist

Cleaner records make cash and tax reviews more useful, especially before VAT quarters and year end.

Read the checklist

Cashflow FAQs

Questions owners ask when tax bills start affecting cash.

Can I use one percentage for tax set-aside?

A percentage can be a rough habit, but it should not replace a review of profit, VAT, payroll, business structure and actual payment dates.

Do I need a separate tax bank account?

Some owners find it useful, but the key point is discipline: the records and review process must support whatever bank setup the business uses.

When should I ask my accountant?

Ask before taking dividends, making a large purchase, reducing payments on account, or using money that may be needed for VAT, PAYE or tax.

Next step

Review cash, deadlines and tax set-aside before the next decision.

A focused review can check whether the records, reporting rhythm and tax provisions are strong enough for the decisions the business is making.

Start the tax review check

No pressure, no jargon — just a practical first conversation about where you are now and what needs attention.

Book the review