SARS Interest Rates 2025: Current Rates for Underpayments and Refunds

As of early 2025, the SARS interest rates 2025 follow the South African Reserve Bank's adjustments, typically charging 11.75% on underpaid tax (PFMA rate) and paying 7.75% on late refunds. These rates apply to various taxes including VAT, PAYE, and Income Tax, impacting how small businesses manage their cash flow and tax compliance throughout the fiscal year.

Running a small business in South Africa requires a keen eye on your ledger and an even keener eye on the South African Revenue Service (SARS). When the central bank adjusts the repo rate, the ripple effects touch every corner of your financial life. Understanding the SARS interest rates 2025 is vital because these percentages determine the cost of your mistakes and the value of your overpayments. If you miss a deadline for VAT or under-calculate your provisional tax, the interest starts ticking immediately. Conversely, if SARS takes too long to pay back your refund, you are entitled to interest on that capital. This guide breaks down exactly what you need to know to protect your business's bottom line.

What are the current SARS interest rates 2025 for underpayments?

The SARS interest rate for underpayments is currently aligned with the Public Finance Management Act (PFMA) rate, which sits at 11.75% per annum for the 2025 period. This rate is charged on any tax debt not paid by the due date, including late payments of VAT, PAYE, and Corporate Income Tax.

This interest is compound interest, meaning it is calculated on the daily balance of the outstanding debt. For a small business owner, this can turn a manageable tax bill into a significant financial burden very quickly. SARS does not view interest as a penalty, but rather as a charge for the 'use of money' that rightfully belongs to the state. Therefore, even if you have a valid reason for being late, the interest is almost always non-negotiable.

Why does the interest rate on underpayments change?

SARS interest rates are linked to the repo rate set by the South African Reserve Bank. When the Monetary Policy Committee (MPC) raises rates to combat inflation, SARS follows suit by adjusting the rates published in the Government Gazette. This ensures that the cost of owing money to the government stays in line with the broader commercial lending market in South Africa.

How much does SARS pay on tax refunds in 2025?

In 2025, SARS pays an interest rate of 7.75% on late tax refunds, known as the 'credit rate'. This rate applies when SARS fails to pay a refund within the legislated timeframe, provided the delay is not caused by the taxpayer failing to provide bank details or requested documentation.

It is important to note that the rate SARS pays you (7.75%) is lower than the rate you pay SARS (11.75%). This spread is intentional and mirrors commercial banking practices. As a business owner, you should never view a SARS refund as a high-interest savings account. The primary goal should always be to maintain accurate records and ensure that your provisional tax payments are as close to your actual liability as possible to avoid overpaying in the first place.

What are the different types of SARS interest rates?

SARS manages several specific interest rates depending on the type of tax and the nature of the transaction. The two most common are the PFMA rate for underpayments and the Section 7(b) rate for refunds, but there are also Fringe Benefit interest rates to consider.

The PFMA Rate (Underpayments)

This is the rate applied to regular tax debts like VAT, PAYE, and Income Tax. It is currently 11.75%. If you fail to pay your monthly VAT return by the end of the month, or your PAYE by the 7th of the following month, this is the rate that will apply to your outstanding balance.

The Refund Rate

Governed by the Income Tax Act, this rate is applied to refunds that are delayed through no fault of the taxpayer. It currently stands at 7.75%. You generally only start earning this interest once a certain period has passed after your assessment or after you have complied with all audit requirements.

The Fringe Benefit (Official) Rate

This rate is used to calculate the taxable value of low-interest or interest-free loans provided by an employer to an employee. For 2025, the official rate is set at 9.25% (Repo rate + 1%). If you lend money to an employee at 0% interest, the difference between 0% and 9.25% is considered a taxable benefit, and PAYE must be deducted accordingly.

How is interest calculated on late VAT payments?

Interest on late VAT payments is calculated daily from the first day of the month following the period the tax was due until the date of payment. SARS uses 11.75% per annum as the base for this calculation, but it is applied to the balance daily, which leads to compounding effects.

For example, if your SME owes R50,000 in VAT for the January period and you only pay it in March, you will be hit with both a 10% late payment penalty (R5,000) and the daily interest on the R50,000. Many business owners mistake the penalty for the interest—they are separate charges. The penalty is a one-off punishment, while the interest is a continuous charge that grows until the debt is settled.

Does SARS charge interest on provisional tax underestimations?

Yes, SARS charges interest under Section 89quat of the Income Tax Act if your provisional tax payments for the year do not sufficiently cover your final tax liability. If your taxable income exceeds R1 million and your total provisional payments were less than 80% of your final tax, interest will be charged at 11.75%.

This is a common trap for scaling startups. As your revenue grows, your 2025 provisional tax estimates must be accurate. If you deliberately or accidentally underestimate your income in your first or second provisional tax periods, the interest backdated to the second payment date can be substantial. Successful businesses use real-time accounting data to ensure their 80% threshold is always met, avoiding the sting of SARS interest rates 2025.

How can you avoid paying interest to SARS?

The most effective way to avoid interest is to implement a strict tax calendar and maintain up-to-date financial records. You should ensure all VAT, PAYE, and Income Tax returns are submitted and paid at least 48 hours before the deadline to allow for bank processing times.

Using an automated bookkeeping system is the best defense against interest. When your bank feeds are reconciled daily, you can see exactly how much VAT you owe in real-time. This eliminates the 'surprise' tax bill at the end of the month that forces many business owners to pay late. Additionally, always keep a tax reserve account—a separate business savings account where you transfer a portion of every invoice to cover future tax obligations.

Can SARS interest be waived or remitted?

You can request a remission of interest and penalties through the SARS eFiling platform or by submitting an ADR1 form. However, SARS rarely waives interest unless you can prove that the delay was caused by a technical error on the part of SARS or a catastrophic event beyond your control.

Unlike penalties, which are often waived for 'first-time' offenders with a good compliance record, interest is much harder to get rid of. SARS views interest as the price of borrowing money from the fiscus. To be successful in a remission request, you must provide documented evidence that it was physically impossible to make the payment on time, such as a major bank failure or a national state of disaster.

Why the SARS interest rates 2025 matter for your cash flow

Cash flow is the lifeblood of any South African SME. When interest rates are high, as they are in 2025, the cost of tax debt is significantly higher than the interest you might earn in a standard business savings account. This creates a financial 'drag' on your business.

If you have extra cash, it is almost always more profitable to pay down your tax debt than to keep the money in a bank account earning 5% or 6%. By paying SARS early or on time, you are effectively 'earning' an 11.75% return by avoiding that expense. Managing your tax liability according to the SARS interest rates 2025 is not just about compliance; it is about smart capital allocation.

How Smartbook simplifies tax compliance for SA businesses

Navigating the complexities of SARS interest rates 2025 and shifting tax deadlines can be overwhelming for small business owners. Smartbook is designed specifically for the South African context, integrating seamlessly with SARS requirements and providing real-time visibility into your tax obligations. Our platform helps you track VAT, manage PAYE, and prepare for provisional tax periods with ease. By keeping your records accurate and automated, Smartbook ensures you never face the high costs of late payment interest. Take control of your business finances today and let Smartbook handle the complexity of compliance.

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