July has arrived, and with it, tax return filing season. While many people would prefer not to think about it, ignoring your return or not carefully checking your auto-assessment could cost thousands.

“Tax is the largest annual expense for most South Africans. It’s bigger than rent and groceries, bigger than almost anything in their budget, yet most people never think about optimising it,” says Alex Cook, Chief Executive Officer of financial wellness fintech Wealthbit.

The difference between letting the South African Revenue Service (SARS) do its calculations and really getting to grips with your tax position can amount to tens of thousands of Rands a year.

“Bear in mind that money does not disappear; it either goes to SARS or it stays with you, where it can compound towards your future,” says Cook.

Yet, for most South Africans tax is a part of life they don’t question:  the various deductions (pension, medical aid, etc) come off when their salary comes in, then once a year, they get an unexpected windfall or an unwelcome bill. Beyond this, the subject feels both vague and complicated.

In assessing what you might owe or be owed, the following rules are taken into account in terms of tax collection in South Africa:

• How you earn (salary, freelance or commission income, or a mix).
• How your income is structured (sole employment versus a side business, for example).
• What you contribute (retirement funds, medical aid, tax-free savings).
• Which benefits and credits apply to you (medical tax credits, retirement deductions, rebates).

“You need to fully understand all these moving parts to fully assess whether your current tax setup is beneficial or you are, in fact, leaving money on the table,” says Cook.

Wealthbit's free, downloadable Compare Your Options Tax Tool shows how savings and investment choices affect your tax and long-term wealth. Its Tax Snapshot Tool calculates whether you're maximising your deductions, and provides:

The Wealthbit Tax Snapshot Tool provides the following:

• An estimate of how your income is being taxed.
• Whether your medical aid and retirement contributions are reducing your tax effectively.
• Whether there is room to reduce tax legally through smarter contributions.
• Whether your current structure is already working well.

A breakdown of this kind can be extremely useful, and not just for the high-flyers either, but anyone earning money and paying tax needs to know if they have optimised their tax obligations.

It's also a good moment to plan ahead: Budget 2026 raised the annual tax-deductible retirement contribution cap from R350,000 to R430,000, and lifted the tax-free savings account contribution limit from R36,000 to R46,000 a year. Both have been effective from 1 March 2026. So while neither change affects the return you're about to file for the past tax year, they widen the room you'll have to reduce tax on the year ahead.

“Never forget that tax is one of the biggest levers in your financial system. When you understand its effect on your income and contributions, your other financial decisions become much easier,” says Cook.  “Greater clarity means less stress, and with the right structure, your money can work a lot harder for you.”