Tax deducted at source is money your employer or payer removes from your income before you receive it

Tax deducted at source (often called TDS or withholding tax) is income tax that gets taken out of your pay by the person or organisation paying you — not by you, and not after the fact. Your employer, bank, or contractor removes the tax and sends it directly to the tax authority on your behalf. You never see that money in your account.

The amount withheld depends on your income level, the type of payment, and the tax rules in your country or state. Some payments — like salary — have tax removed automatically every pay period. Others — like interest from savings or payments to contractors — have tax removed only once, at the moment you receive the money.

The purpose is to collect tax gradually throughout the year rather than asking you to pay a large lump sum when you file your return. It also reduces the chance that someone will spend the money and have nothing left to pay when the bill arrives.

Key Takeaways

  • Your employer or payer removes tax from your income before you get paid, then sends it to the tax authority.
  • The amount withheld is based on your income bracket and the type of income, not on what you personally owe.
  • You can claim back any tax withheld that exceeds what you actually owe when you file your annual return.
  • Different income types — salary, interest, dividends, contractor payments — have different withholding rates.
  • The tax authority uses these withheld amounts to reduce what you owe or to calculate a refund.

How withholding works with your salary

When you start a job, you provide your employer with tax information — usually a form that tells them your filing status and number of dependents (or equivalent in your country). Based on that form, the employer calculates how much tax to remove from each paycheck.

The calculation is standardised. Your employer uses tax tables provided by the tax authority to determine the percentage or amount. If you earn £30,000 a year and fall into the 20% tax bracket, your employer withholds roughly 20% of each payment, spread across the year. You see the gross amount (before tax) and the net amount (after tax) on your payslip.

The withheld amount is not final. It is an estimate based on the information you provided. If your circumstances change — you get a second job, you marry, you have a child — the withholding may no longer match what you actually owe. That is why you file an annual tax return: to settle the difference.

Withholding on interest, dividends, and other income

Not all income comes from an employer. Banks withhold tax on interest you earn. Investment companies withhold tax on dividends. Contractors and freelancers often have tax withheld when they invoice larger organisations.

The withholding rate for these payments is usually fixed — often 10%, 15%, or 20% depending on the income type and your country's rules. Unlike salary withholding, which adjusts based on your personal tax form, this withholding happens automatically and the payer has no information about your other income or circumstances.

This matters because you might earn £500 in interest but have £100 withheld, leaving you £400. If you are in a lower tax bracket than the withholding rate assumes, you have overpaid and can claim the difference back on your return. If you are in a higher bracket, you may owe more.

What happens when you file your annual return

The tax authority tracks all the money withheld from you throughout the year. Your employer reports it. Your bank reports it. Your investment company reports it. When you file your annual tax return, you declare all your income and the tax authority compares it to what was already withheld.

If more tax was withheld than you owe, you receive a refund. If less was withheld than you owe, you pay the difference. If the amounts match exactly, you owe nothing and receive nothing — though this is rare because withholding is an estimate, not a precise calculation.

The return is where you correct any mistakes. If your employer withheld too much because you were unemployed part of the year, or because you had large deductible expenses, the return is where you recover that overpayment. This is why filing, even if you are owed a refund, matters.

Why withholding rates differ by income type

Salary withholding is personalised — your employer knows your filing status and can adjust for your circumstances. Interest and dividend withholding is standardised because the bank or investment company does not know whether you have other income, dependents, or deductions.

Governments set different withholding rates for different income types partly for administrative simplicity and partly because some income is considered more certain or more easily tracked. A salary is regular and documented. Interest is predictable. A one-off contractor payment is harder to predict and may have a higher withholding rate to be safe.

Some countries also offer exemptions. If your total income is below a threshold, you may be able to tell your bank not to withhold tax on interest. If you are retired and have no tax liability, you may be able to claim an exemption from withholding on certain payments. These exemptions require you to submit a form proving your status.

Common situations where withholding causes confusion

A second job often surprises people. Your first employer withholds based on the assumption that is your only income. Your second employer does the same. Together, they withhold far more than you owe because each one thinks you earn less than you do. You discover this when you file your return and owe money instead of receiving a refund.

Freelancers and contractors sometimes receive payments with no withholding at all — especially from small businesses or individuals who are not set up to withhold. The contractor then owes the full tax bill at the end of the year and may not have set money aside. Conversely, some large organisations withhold from contractor invoices, and the contractor must track this and claim it back on their return.

Interest and dividends withheld at a standard rate can also create confusion. You might receive a statement showing £100 in interest but only £80 in your account. The £20 was withheld. If you are in a lower tax bracket, you can recover it. If you are in a higher bracket, you owe more. Many people do not realise this until they file their return.

How to adjust withholding if it is wrong

If you know your withholding is incorrect — because you have a second job, or because you are self-employed part-time, or because your circumstances changed — you can usually adjust it before the year ends. Most tax authorities allow you to submit a new withholding form to your employer to increase or decrease the amount removed.

If you are over-withheld, you can ask your employer to reduce the withholding so you take home more pay. If you are under-withheld, you can ask to increase it so you do not owe a large amount at tax time. The adjustment takes effect on the next paycheck.

For interest and dividends, you usually cannot adjust the withholding rate — it is set by law. But you can claim an exemption if you may have access to, or you can wait and recover the overpayment on your annual return. Some countries also allow you to file a return mid-year if you know you will owe money, so you can pay it gradually rather than in one lump sum.

Frequently Asked Questions

Can I get back tax that was withheld from me?

Yes, if more tax was withheld than you owe. When you file your annual return, the tax authority compares what was withheld to what you actually owe based on your total income and deductions. If you overpaid, you receive a refund. This refund comes from the tax authority, not from your employer.

Why does my payslip show two different amounts?

The gross amount is what you earned before tax. The net amount is what you take home after tax and other deductions (like pension contributions or health insurance) are removed. Tax deducted at source is the difference between these two. Your payslip should itemise exactly what was withheld and why.

What if my employer withheld the wrong amount?

If you believe the withholding is incorrect, you can submit a new tax form to your employer with updated information about your filing status or dependents. If the error is discovered after the year ends, you can claim the correction on your annual return. If your employer made a genuine mistake, they may issue a corrected payslip or adjust future withholding.

Do I still need to file a return if tax was withheld?

Yes. Withholding is not the same as filing. The tax authority needs your return to know your total income, deductions, and exact tax liability. Even if your employer withheld the correct amount, filing confirms this and ensures you receive any refund you are owed. Some people are required to file even if they expect no refund.

Is withholding tax the same as income tax?

Withholding tax is the mechanism — the process of removing tax before you receive payment. Income tax is the type of tax being withheld. You can also have withholding on other types of tax, like capital gains tax or self-employment tax, depending on your country's rules. The withholding is just the timing and method of payment.