Online Seller Tax in Sri Lanka: What You Actually Owe

You started by selling a few things. Maybe it was ceramics on Instagram, or phone accessories on Daraz, or prints on Etsy to buyers you'll never meet. Then it kept going, and somewhere along the way it stopped feeling like a side thing.

Now you have a question nobody in the seller groups answers the same way twice: how much of this do you owe tax on?

The short version is that you're taxed on profit, not on sales. That distinction is worth more money to an online seller than almost anything else in this article, because the gap between the two numbers is enormous once you're moving stock. Below, we'll work through a real set of figures where a shop turning over Rs. 7.2 million pays Rs. 36,000 in tax.

There's also one belief circulating among Sri Lankan sellers that costs people real money, and we'll deal with it head on in section four.

Is my online store income actually taxable, or is it just a hobby?

This is the first thing most sellers want to know, usually while hoping the answer is "hobby."

The Inland Revenue Act doesn't give you a number to hide behind. There is no turnover figure below which selling is automatically a hobby. Section 195 defines a business to include "a trade, profession, vocation or isolated arrangement with a business character however short the duration of the arrangement." Read that last clause again. Even a one-off deal can count if it has a commercial character.

So how does anyone tell the difference? It comes down to a set of factors that tax people call the badges of trade:

• Repetition. Occasional sales look different from a listing you refresh every week.
• Organisation. A shop name, a product line, stock you hold, a delivery process. All of it points to a trade.
• What you're selling. Buying things in commercial quantities that you can't personally use suggests you bought them to sell.
• Supplementary work. Making, finishing, packaging or improving items before sale points strongly to a business.
• Motive. The main one. Did you acquire these things intending to make a profit?

Clearing out your own wardrobe on Facebook Marketplace isn't a business. Buying twenty units of something to resell at a markup is, even if it's small.

How do I work out my taxable profit from online sales?

Start with everything the store brought in, then subtract what it cost you to earn it. What's left is your business profit, and that's what feeds into the tax calculation.

Meet Nadeesha. She makes ceramics at home, sells locally through Instagram, and ships internationally through Etsy. Here's her Year of Assessment 2026/2027.

A shop that turned over Rs. 7.2 million pays Rs. 36,000.

Now look at what happens if Nadeesha keeps no records and can't evidence a single cost. Her taxable income becomes Rs. 5,400,000, which runs through the slabs to Rs. 420,000 plus 36% of the excess over Rs. 2,500,000. That's Rs. 1,464,000.

Her receipts and platform statements are worth Rs. 1,428,000 to her. That's the whole argument for bookkeeping, in one number.

For reference, these are the rates her profit runs through:

Neither the relief nor these bands changed for 2026/2027. The Inland Revenue (Amendment) Act No. 11 of 2026 left both alone. If you want the mechanics of the slab walk in more detail, our guide on how to calculate income tax in Sri Lanka goes through it step by step.

Which selling costs can I actually deduct?

Almost everything you spend to run the shop, provided it's genuinely a business cost and not personal spending.

Two of these have wrinkles worth understanding.

Stock doesn't work the way people expect. Section 13 doesn't let you deduct purchases in the year you buy them. The allowance is opening stock, plus what you spent on stock during the year, less closing stock. The practical effect is that an item becomes deductible in the year you sell it. Buy Rs. 800,000 of inventory in March and sell none of it before the 31st, and none of it reduces this year's profit. It rolls into next year.

Advertising gets favourable treatment. Section 15A lets you deduct marketing and communication expenses "irrespective of whether they are of a capital nature or not," which is unusually generous. Section 15A(2)(c) covers advertising on mainstream or social media, and unlike subsection (2)(b), which restricts campaign development and production to work carried out in Sri Lanka, paragraph (c) puts no geographic limit on where the ad runs or who hosts it. So your Meta and Google spend is covered.

There's now extra support for exporters specifically. Amendment Act No. 11 of 2026 inserted a new Section 72(3), which says a payment with no source in Sri Lanka "shall be directly deducted in calculating income, to the extent that such payment is incurred during the year of assessment in relation to the export of goods or services from Sri Lanka." If you're paying overseas platforms to sell overseas, that provision is squarely on your side.

Our guide to what expenses freelancers can deduct covers the shared costs question, which matters if you're running the shop from home.

Do I pay less tax if I sell to overseas buyers?

No. And this is the belief that costs sellers money.

Plenty of people have heard that Sri Lankans earning in foreign currency pay a capped 15% rate. That's real, and it's in paragraph 1(6) of the First Schedule. But read the actual words. Sub-paragraph (a) applies to "the gains and profits earned or derived from any service rendered in or outside Sri Lanka to any person to be utilized outside Sri Lanka, where the payment for such services is received in foreign currency and remitted through a bank to Sri Lanka."

Service. Not goods. There's no mention of selling, exporting or supplying products anywhere in it.

The other limb, sub-paragraph (b), covers profits from "any foreign source." That doesn't rescue you either. Section 74 treats an amount as foreign-sourced only to the extent it has no source in Sri Lanka, and under the Section 73 source rules, income from a business activity conducted in Sri Lanka is Sri Lankan-sourced. If you make, store, pack and ship from Sri Lanka, your selling business is here. The buyer's location doesn't move it.

So a rupee of profit from a Colombo customer and a rupee of profit from a buyer in Melbourne are taxed identically, at 6% to 36% after relief. Foreign currency changes your paperwork, not your rate.

This is exactly where selling goods parts company from selling services. A freelance designer invoicing an overseas client does fall inside the 15% cap, which is why the position looks so different in our article on the freelancer foreign income tax rate. It's also different from earning platform advertising payouts, which we cover separately in how YouTube income is taxed in Sri Lanka. Same foreign currency, three different treatments.

What exchange rate do I use for a sale in dollars?

The Central Bank of Sri Lanka rate on the date the sale is taken into account. That's Section 26(6).

The part that trips people up is which date that is. Section 21(3) is blunt about it: "An individual or entity conducting business shall account for income tax purposes on an accrual basis." Cash basis isn't available to you. And under Section 23, you derive an amount when it becomes receivable, which is when you become entitled to it, "even if the time for discharge of the entitlement is postponed."

For a shop, that's the sale date. Not the day Etsy releases your payout, not the day the remittance clears.

This catches sellers out because platforms hold funds. You make a sale on the 4th, the platform releases it on the 20th, and it reaches your bank on the 26th. The rupee value that goes into your accounts is the one from the 4th.

The exchange rate rules for foreign income go deeper on this, including how it differs for employees, who genuinely do use the receipt date because Section 21(2) puts employment income on the cash basis.

When do I have to start paying quarterly instalments?

The moment you have business income. Section 90(1)(a) makes anyone who "derives or expects to derive assessable income during a year of assessment from a business, investment or other income" an instalment payer. There's no turnover trigger and no grace year for new sellers.

Four dates, and they don't move:

How much? The Statement of Estimated Tax under Section 91 was abolished for years of assessment starting on or after April 1, 2026, so you no longer file a forward estimate. Each instalment is now (A − C) ÷ B, where A is your tax payable for the immediately preceding year, B is the number of instalments left including this one (4, then 3, then 2, then 1), and C is what you've already paid or had withheld during the year.

Take Nadeesha's Rs. 36,000. If that were her preceding-year tax, her first instalment would be (36,000 − 0) ÷ 4, or Rs. 9,000. Her fourth would be whatever remains.

If you had no taxable income last year, which is the normal position for a shop in its first year, or if you reasonably expect this year to be lower, you use an estimate of the current year instead, on the basis specified by the Commissioner-General. The IRD's 2026/2027 instalment circular sets out the declaration you file to use that alternative basis, and our quarterly tax payments guide covers the mechanics generally.

What about VAT and the Social Security Contribution Levy?

These are different animals. Income tax hits your profit. VAT and SSCL hit your turnover, which means they can bite even in a year you made no money.

The good news for most readers is that both sit well above where a home-based shop operates.

SSCL is settled law. The Social Security Contribution Levy (Amendment) Act No. 10 of 2026, certified on April 9, 2026, requires registration within fifteen days of turnover exceeding Rs. 9 million in a quarter, or Rs. 36 million across four consecutive quarters, for periods from July 1, 2026. The rate is 2.5%, but wholesale and retail sellers are charged on only 50% of turnover, so the effective rate is 1.25%. We covered the change in detail in our piece on the 2026 SSCL amendment.

VAT needs a caveat. The enacted registration thresholds are Rs. 15 million of taxable supplies in a quarter or Rs. 60 million over twelve months, with the standard rate at 18%. A Value Added Tax (Amendment) Bill gazetted on April 29, 2026 proposes cutting those to Rs. 9 million and Rs. 36 million from July 1, 2026. As things stand in the published material, that document is still a Bill. It carries no Act number and no certification date, so treat the lower figures as proposed rather than law and confirm the current position with the IRD before you act on them.

What happens if I file or pay late?

The instalment penalty is survivable. The interest is what compounds against you.

Your annual return is due within eight months of the year end under Section 93(1), which is November 30. For the Year of Assessment 2026/2027, that's November 30, 2027.

File it late and Section 178(1) applies the greater of two amounts: 5% of the tax owing plus 1% for each month the failure continues, or Rs. 50,000 plus Rs. 10,000 for each month. Section 178(2) caps the total at Rs. 400,000. Note the shape of that. The flat Rs. 50,000 minimum means a late return costs you real money even in a year the shop barely broke even.

Where this leaves you

Four things to take away.

You're taxed on profit, and the difference between profit and revenue is the difference between Rs. 36,000 and Rs. 1,464,000 in Nadeesha's case. Your stock cost becomes deductible when the item sells, not when you buy it. Overseas buyers don't earn you a lower rate, because the 15% concession is written for services. And the exchange rate you need is the one from the sale date, which means capturing it as you go.

None of this requires an accountant to start. It requires knowing what to write down, which is most of the battle.