A provisional payment on the 31st shouldn't be a shock on the 30th. Move a fixed percentage of every deposit into a separate account as it arrives, and the deadline stops being an event.
When a client pays an invoice, the full amount, including VAT and the portion that will eventually cover income tax, lands in the operational account. Because it's visible and accessible, it gets absorbed into daily running costs. In effect, many businesses use SARS as an unofficial overdraft, funding inventory, payroll or expansion with money that was never really theirs. When the IRP6 or VAT201 comes due, the cash is gone, and what follows is emergency borrowing or a payment default that was entirely avoidable.
The fix is a second, interest-bearing account used for nothing else. Work out a blended sweep rate with your accountant based on your historical VAT and effective tax rate, commonly somewhere around 25% of gross deposits, and transfer that percentage out of every payment within 24 hours of it clearing. Most cloud banking platforms can automate this rule so it happens without anyone remembering to do it manually. By month-end, your VAT, PAYE and provisional tax reserves are already sitting ring-fenced and earning interest, separate from the account funding daily operations.
Blended cash flow creates an optical illusion. R1,000,000 in the operational account might include R150,000 in collected VAT and R200,000 earmarked for tax, leaving R650,000 of genuine operating cash. Spending decisions made against the full R1,000,000 figure are, in effect, spending money that was never available. Sweeping the tax portion out immediately forces the business to survive on its true after-tax margin, which is a more honest test of profitability than looking at the blended balance ever was.
Review the wallet's balance against your actual liability each quarter. If it holds more than you owe, the surplus can move back into operations. If it's short, that's an early signal to revisit pricing or costs before the shortfall becomes a deadline-day problem.
Calculate a blended sweep rate with your accountant. Base it on your historical VAT and effective tax rate, not a guess.
Open a dedicated, fee-free account for tax only. Interest-bearing where possible, and never touched for anything else.
Automate the transfer on every deposit. A banking rule removes the risk of the habit lapsing under pressure.
Reconcile the wallet quarterly. Confirm it matches your actual liability and adjust the rate if it consistently runs short or long.
There's no universal figure. It depends on your VAT rate and your effective income tax rate on gross revenue, so it's worth calculating properly with your accountant rather than picking a round number.
No. The wallet ensures the cash is available when the estimate comes due, but the estimate itself still needs to be built from real, current figures.
Yes. Lenders reviewing your balance sheet read a fully funded, ring-fenced tax provision as a sign of financial discipline, which can support better lending terms.
Treating tax as a daily deduction rather than an annual emergency removes most of the anxiety around deadline day. Set the sweep rate, automate it, and reconcile it quarterly. For more on cash flow management, see our blog.
Need expert tax and accounting support? The Compliance Clinic helps South African businesses stay compliant, reduce tax liabilities, and grow with confidence. Contact us today | View our services
A brief from the lead partner — what changed at SARS this month, one practice note, one decision-trigger to watch. Unsubscribe in one click.
