What counts as "income" when you freelance on the side

More South Africans now earn from more than one place at once: a full-time job plus freelance work on weekends, a rental property, or the occasional invoice for consulting. SARS doesn't look at each of these separately. Everything you earn in a tax year, whatever the source, gets added together into a single taxable income figure.

Understanding how that combination works, and where it can catch you off guard, matters more than most people realise.

Your salary is only part of the story

When you're employed, your employer deducts PAYE (pay-as-you-earn) from your salary every month and pays it to SARS on your behalf. That system is built to tax one thing: the salary itself. It has no visibility into what you earn outside that job.

None of that income has tax withheld automatically. The responsibility to declare it, and to make sure enough tax gets paid on it, sits with you.

Freelance and side hustle income is trade income

Money earned from freelance work, consulting, or running a side business is treated by SARS as income from carrying on a trade, in the same category as running a formal business. It doesn't matter whether the work is occasional or regular, or whether you've registered a company. If you're doing work in exchange for payment, that income is taxable and must be declared in the tax year you earned it.

Rental income follows the same rule, with its own detail

Rental income is also added to your other income and taxed at your normal marginal rate, not at a separate, flat rate. What's specific to rental income is the list of expenses SARS allows you to deduct against it.

Capital improvements aren't deductible as expenses; they're added to the property's base cost for capital gains tax purposes when you eventually sell. If you rent out only part of a property, for instance a room in your own home, expenses have to be apportioned based on the share of floor space that's let out.

If your rental expenses exceed the rental income in a given year, the resulting loss can offset other income, provided the letting is a genuine, ongoing trade rather than an occasional arrangement.

The R30,000 exception doesn't cover side hustle income

There's a common misunderstanding worth clearing up. SARS allows one exclusion from provisional tax registration: if your only income outside a single PAYE-registered employer is interest, dividends, or rental, and that income doesn't exceed R30,000 for the tax year, and your total taxable income stays under the annual tax threshold, you don't need to register as a provisional taxpayer.

If you earn any trade income alongside a salary, and your combined taxable income for the year exceeds the tax threshold, you're required to register as a provisional taxpayer and pay tax on that income twice a year, on top of whatever your employer already withholds from your salary.

Why the combination matters

Because PAYE is calculated only on your salary, it doesn't account for what you earn elsewhere. Add a second income stream, and your true taxable income, along with the tax bracket it falls into, can end up higher than what your employer's payroll system assumes.

The only real way to avoid being caught out is to treat every income stream as taxable from the moment you earn it, not just at filing time, and to set money aside against it as it comes in rather than after the fact.

Keeping a running record of what you've earned from each source, alongside the expenses that go with it, makes this far easier to manage than trying to reconstruct it once a year.