This is the tax obligation that most often takes small businesses by surprise, because it applies to money you are paying out rather than income you are receiving.
The principle: when a business makes certain payments to a non-resident, it may be required to deduct tax at source and remit it, paying the supplier only the net amount.
| Applies to | certain payments to non-residents |
|---|---|
| Typical categories | interest, royalties, technical and management fees, dividends |
| Obligation sits with | the payer, not the recipient |
| Relief | reduced rates under a tax treaty, where one applies |
Why the mechanism exists
The logic is straightforward once stated. A foreign recipient has no presence in the country and no filing obligation there. If the country wants to tax income arising within its borders and flowing abroad, it cannot practically collect from the recipient.
So it collects at the only point it controls: the local payer.
This is why the obligation, and the liability for getting it wrong, attach to the payer. From the authority's perspective, you are the collection point.
The consequence to internalise: if you should have withheld and did not, the authority pursues you, not your supplier — and by then you have already paid the supplier in full.
What typically triggers it
Categories vary by jurisdiction, but commonly include:
- Interest on loans from abroad, including from a related company
- Royalties — payments for the use of intellectual property, trade marks, software or content
- Technical, management and consultancy fees
- Dividends paid to foreign shareholders
- Rent for property or equipment
- Sometimes payments for services performed in the country by a foreign provider
Two categories deserve particular attention because modern businesses pay them constantly without thinking:
Software and digital services. Depending on how a payment is characterised, a licence fee for software may fall within royalties. The distinction between buying a product and licensing intellectual property is not always obvious, and the answer varies.
Related-party charges. Management fees or interest paid to a parent or affiliated company abroad attract particular scrutiny, both for withholding and for the pricing questions covered elsewhere on this site.
The gross-up problem
Here is where the commercial friction appears, and it is worth understanding before you negotiate a contract rather than after.
Suppose you agree to pay a foreign consultant a fee, and withholding applies. You deduct and remit the tax, and the consultant receives less than the agreed figure.
The consultant may object that they agreed to a net amount. If the contract says the payment shall be made free of deductions — a gross-up clause — then you must increase the payment so that the recipient receives the full agreed sum after tax.
The effect on your cost is significant, and it is entirely predictable once you know to look for the clause.
The practical rule: settle in the contract who bears withholding tax, before signing. Silence on the point produces exactly the dispute you would want to avoid.
Treaty relief and how to claim it
Where a tax treaty exists between the two countries, it commonly reduces the withholding rate on particular categories, or eliminates it.
The relief is not automatic. Typically you must:
- Confirm a treaty applies to the two countries and to the specific type of payment
- Obtain a certificate of tax residence from the recipient, issued by their tax authority
- Check any beneficial ownership condition — treaties usually restrict relief to the genuine owner of the income, not a conduit
- Apply the reduced rate, or withhold at the full rate and claim a refund, depending on the local procedure
- Keep the documentation, because relief claimed without support will be reversed on audit
Step two is the practical bottleneck. Residence certificates take time to obtain and often have a validity period, so ask the supplier for one early — ideally when the contract is signed rather than when the invoice arrives.
Getting the administration right
- Identify affected payments before making them, not at year end
- Deduct at the correct rate and remit by the deadline
- Issue the recipient a certificate of tax deducted — they usually need it to claim credit at home, and providing it promptly protects the relationship
- File the required returns, which are typically separate from the company's own return
- Keep a register of cross-border payments and the treatment applied to each
The third point is worth doing well for a commercial reason as much as a compliance one. A supplier who can claim credit for the tax withheld is much less unhappy about the deduction, because their overall position is largely restored.
Explaining that at the outset turns a difficult conversation into an administrative one.
Frequently asked questions
Who is responsible for withholding tax?
The payer. The authority cannot practically collect from a foreign recipient with no presence there, so it collects at the point it controls — and pursues the payer if the deduction was not made.
What is a gross-up clause?
A contract term requiring payment free of deductions, which means you must increase the payment so the recipient still receives the full agreed sum after tax. Settle who bears the tax before signing.
Is treaty relief automatic?
No. It generally requires confirming the treaty covers that payment type, obtaining a residence certificate from the recipient, meeting beneficial ownership conditions, and keeping the documentation.
How do you keep the supplier relationship intact?
Issue the certificate of tax deducted promptly — the supplier usually needs it to claim credit at home, which largely restores their position and turns a dispute into an administrative step.
