Quick Answer What Is Provisional Tax and Must I Pay It? Provisional tax is not a separate tax – it is paying your normal income tax in advance, in two instalments (end August and end February) with an optional third top-up (end September). All companies are provisional taxpayers, as is anyone earning income that has no PAYE deducted. What this means in plain language PAYE employees have tax deducted monthly; everyone else – companies, sole proprietors, freelancers, landlords – pays it themselves in advance, based on an estimate of the year’s income. The IRP6 return is the vehicle. The trap is the estimate: underestimate by too much and SARS adds…