Withholding Tax Calculator

Compute withholding taxes on invoices, cross-border payments, dividends, or royalties.

Gross Payment Amount ($)

Withholding Tax Rate (%)

Gross Amount

Tax Withheld

Net Payment

Formula / Calculation

Withheld Amount = Gross Payment × Tax Rate

Understanding Withholding Taxes (WHT)

Withholding Tax (WHT), or a retention tax, is a government requirement for the payer of an item of income to withhold or deduct tax from the payment, and pay that tax to the government. This is commonly applied to payroll, but also plays a massive role in cross-border B2B payments involving royalties, dividends, and technical service fees to foreign entities.

Mechanics of Withholding

Tax Treaty Rates

Many countries have Double Taxation Avoidance Agreements (DTAAs) that lower or eliminate standard withholding tax rates for residents of partner countries.

Grossing Up

If a contract specifies payment "net of taxes," the payer must mathematically "gross up" the invoice to ensure the receiver gets the exact agreed amount after taxes are withheld.

Foreign Tax Credits

The payee can often use the withholding tax deducted by the foreign client as a Foreign Tax Credit against their own domestic tax liabilities.

Tips for International Billing

Always establish who bears the withholding tax burden in your service contracts (Gross pricing vs. Net-of-tax pricing).

Obtain residency certificates quickly to take advantage of reduced treaty rates.

If grossing up an invoice, use the formula: Net Target / (1 - Withholding Rate).

Frequently Asked Questions

What happens if a client forgets to withhold tax?

In many jurisdictions, the legal liability lies entirely on the payer. If they fail to withhold, the tax authority may penalize the payer, making them remit the tax out of pocket.