Free employee tool

Sri Lanka Income Tax Calculator

Salary, fixed deposits, rent, foreign clients, self-employment — or all of them at once. This free income tax calculator combines every source the way the IRD does, subtracts the tax already withheld from you, and tells you whether you need quarterly payments or just one annual return.

In short

Calculate your total Sri Lanka income tax for Y/A 2025/26 across salary, freelance, rent, interest, and foreign income. The first Rs 1.8 million per year is tax-free; bands then run 6% to 36%, with remitted foreign-currency income capped at 15%.

Where does your money come from?

Tap everything that applies to you — most people have more than one. Or

Your result Rs. — Tap your income types on the left to begin.

All your income for the year—
Tax-free allowance (everyone gets this)—
The part that gets taxed—
Tax for the whole year—
Already paid for you (cut at source)—

What you should do

Once you enter your amounts, we’ll tell you whether you need quarterly payments or just one yearly form.

Estimates for a person living in Sri Lanka, using this tax year’s official rules (Inland Revenue Act No. 24 of 2017 as amended in 2025). This is guidance, not tax advice — please confirm with a Chartered Accountant or tax practitioner before paying or filing.

Want this filed, not just calculated? LankanTax Desktop prepares your full return — and your data never leaves your computer.

See LankanTax Desktop

How this tax calculator works

You tap your income types and enter the numbers you already know — monthly salary, monthly rent, yearly totals for the rest. The calculator adds them into one assessable income, subtracts your Rs. 1.8 million personal relief, and applies the current bands — 6% on the first Rs. 1 million of taxable income, then 18%, 24% and 30% per Rs. 500,000 slab, and 36% above that. It then subtracts every rupee already withheld from you (APIT on salary, 5% AIT on professional fees, 10% on rent, 10% on interest) to show the number that actually matters: what’s left to pay — or what you’re owed back.

What each income source does in the calculation

Income	How it’s taxed	Tax withheld from you
Salary	Normal bands; employer deducts monthly APIT	APIT per IRD Table 1 (auto-estimated, or enter your T-10 figure)
FD & savings interest	Normal bands — interest is assessable income, and the bank’s deduction is not a final tax	10% AIT by the bank (creditable)
Rent	Normal bands after the automatic 25% rent relief for repairs & maintenance	10% AIT if your tenant is a company paying over Rs. 100k/month
Foreign clients (FX)	Capped at 15% if received in FX and remitted through a Sri Lankan bank; normal bands otherwise	None — foreign clients don’t withhold
Self-employment (local)	Normal bands on profit after business expenses	5% AIT by company clients above Rs. 100k/month

Sources: IRD Notice PN/IT/2025-01 (rates, relief, 10% interest AIT, 15% cap); Fifth Schedule para 2(c) of the Inland Revenue Act (25% rent relief); IRD Notice PN/IT/2022-03 (5% services / 10% rent AIT); IRD individual return guide (all AIT creditable via Schedule 7).

Quarterly instalments or one annual return?

This is the question multi-income earners get wrong most often, and the calculator answers it for your numbers. The rule of thumb it applies:

Salary only, fully covered by APIT → no quarterly payments. A return matters mainly when you’re owed a refund.
Any business, rental, interest or foreign income with tax still owing → you’re an instalment payer: Statement of Estimated Tax, quarterly payments on 15 August, 15 November, 15 February and 15 May, balance by 30 September, return by 30 November.
Extra income, but your WHT credits cover the bill → instalments would be nil; the annual return reconciles everything and claims any refund.

Worked example: salary + two FDs

Nimal earns Rs. 250,000 a month and his fixed deposits paid Rs. 500,000 interest this year (banks deducted Rs. 50,000):

Salary Rs. 3,000,000 + interest Rs. 500,000

Assessable incomeLKR 3,500,000
Personal relief− LKR 1,800,000
Taxable incomeLKR 1,700,000
Tax (1M × 6% + 500k × 18% + 200k × 24%)LKR 198,000
APIT already deducted (12 × 8,000)− LKR 96,000
AIT on interest− LKR 50,000
Balance to pay for the yearLKR 52,000

Because the Rs. 52,000 comes from investment income his employer can’t withhold on, Nimal is an instalment payer — about Rs. 13,000 a quarter. Without the FDs, his APIT alone would have settled everything, monthly.

Want the monthly payslip view instead? Use the salary & APIT calculator. Leaving a job? There’s a gratuity calculator too.

⚖️

Check before you act

These figures are estimates for a resident individual on Y/A 2025/26 rules, and simplify some edge cases: qualifying payments beyond personal relief, terminal benefits, capital gains, and the fine detail of the 15% FX computation (our method follows the IRD’s SET guide example, as no statutory formula exists). Always confirm your position with a Chartered Accountant or tax practitioner before paying or filing.

Evidence for the rules used

Relief, slabs, 10% interest AIT, 15% FX cap: IRD Notice PN/IT/2025-01 and the consolidated Inland Revenue Act (First Schedule paras 1 & 1(6))
25% rent relief: Fifth Schedule para 2(c) of the consolidated Act; applied in Example 2 of the IRD individual return guide
Interest & other AIT creditable, not final: IRA ss.88–89 and Schedule 7 of the return guide; 5%/10% AIT rates per PN/IT/2022-03
15% cap computation method: IRD Statement of Estimated Tax guide 2025/26, Example 01
Instalment dates and return deadline: IRD Tax Calendar (IRA ss.90, 93)

Multi-income tax

Questions people with mixed income ask.

Do I pay tax on my fixed deposit interest? +

Yes — FD and savings interest is part of your assessable income, taxed at the normal bands after your Rs. 1.8 million personal relief. The 10% the bank deducts is an advance (AIT), not a final tax: it's credited against your bill when you file, and if your total income is below the relief threshold you can give the bank a self-declaration to stop the deduction — or file a return to claim it back.

How is rental income taxed in Sri Lanka? +

Rent from a property you let is investment income taxed at the normal bands — but individuals get an automatic relief of 25% of total rent for repairs, maintenance and depreciation, as long as no actual repair costs are claimed instead. If a company tenant pays you over Rs. 100,000 a month, they deduct 10% AIT, which is credited against your final bill.

When do I need to pay quarterly instalments? +

When you earn income no employer withholds on — business profits, rent, interest, or foreign-client income — and tax is still owing after your credits. Then you file a Statement of Estimated Tax and pay on 15 August, 15 November, 15 February and 15 May, settle any balance by 30 September, and file the return by 30 November. If your only income is a salary fully covered by APIT, no quarterly payments are needed.

I have a salary and freelance income — how are they combined? +

They're added together into one assessable income and taxed as one number: relief comes off the total, and the bands apply to the combined taxable income. Your salary's APIT and any 5% AIT deducted from your fees both count as credits. The practical effect is that freelance income usually sits in your top band — often taxed at a higher rate than your payslip suggests — unless it qualifies for the 15% foreign-currency ceiling.

Can I get the withheld tax back? +

If the APIT and AIT withheld during the year add up to more than your final bill — common when you worked part of the year, or banks deducted 10% on interest despite low total income — the excess is refundable. But only if you file an annual return claiming it: withheld amounts are never refunded automatically.

The calculator shows the number. The return settles it.

LankanTax turns your payslips, interest certificates, rent records and AIT receipts into a ready-to-lodge return — free for individuals, reviewed and lodged by a Chartered Accountant.

See how LankanTax works Monthly salary view

Free for individuals. Your CA’s professional fee is the only cost — shown upfront.