Selling Property in Sri Lanka: Capital Gains Tax Guide

Selling land or a building in Sri Lanka isn't quite like selling a car or some shares. The cash hits your account, the paperwork goes to the Registrar-General, and somewhere in the middle of all that the Inland Revenue Department expects a Capital Gains Tax Return on your desk within thirty days. Most sellers don't find out about that deadline until their lawyer mentions it on transfer day.

This guide walks through what you actually owe, how to work it out with a real example, and what's about to change under the 2026 Amendment Bill. If you're planning a sale in the next year, the timing matters more than you'd think.

What is the capital gains tax on selling property in Sri Lanka?

When a resident individual sells an investment asset, the gain is taxed at a flat 10%. That rate sits in the First Schedule, Paragraph 1(2)(a) of the Inland Revenue Act, No. 24 of 2017.

"Investment asset" is wide. It includes land, buildings, unlisted shares, and most other capital assets you hold as part of your investments. What it doesn't include is your principal residence (more on that below) or shares quoted on the Colombo Stock Exchange, which are fully exempt.

A few things worth noting up front:

• Capital gains are taxed separately from your other income. The 6% to 36% progressive slabs you pay on salary or business profits don't apply here.
• Your Rs. 1,800,000 personal relief cannot be set off against capital gains. The Act is explicit on this.
• Capital gains tax is not part of your quarterly installments. Section 90 specifically excludes investment-asset gains from that schedule.

So whatever you owe, you owe in one lump sum, on one specific date.

How do I calculate my capital gain?

The formula is the simple part. Section 36 defines a gain as:

Gain = Consideration Received − Cost of the Asset

What people miss is everything that goes into "cost." Section 37 lets you add a fair list of items to the headline purchase price, and a careful seller can shave a meaningful amount off the gain by tracking each one.

Your cost base includes:

• Acquisition cost. What you actually paid for the property at the time of purchase.
• Improvements. Money spent altering or improving the asset. A new boundary wall, a second floor, a major renovation. Routine repairs don't count, but anything that adds to the value of the asset does.
• Incidental costs of acquisition. Stamp duty paid at the time of purchase, legal fees, valuation fees, agent commissions.
• Incidental costs of realization. Advertising the property for sale, the broker's commission, transfer fees, professional fees on the sale side.

Keep the receipts. Without documentation, the IRD will work from the bare purchase price on the deed, and you'll pay tax on a larger gain than you actually made.

What's a worked example of the calculation?

Let's work through a realistic case. Suppose you bought a 12-perch plot in Gampaha for Rs. 8,000,000 in 2019. You've held it as an investment ever since. In 2025 you sell it for Rs. 14,000,000. Along the way you spent Rs. 1,200,000 paving a road and building a boundary wall, and you paid Rs. 650,000 to your agent, lawyer, and valuer combined on the sale side.

Without the improvements and selling-cost adjustments, the IRD would have taxed you on a Rs. 6,000,000 gain, which is Rs. 600,000 of tax. Tracking your costs saved you Rs. 185,000.

This is also why the IRD generally wants to see receipts for any cost you're claiming, especially improvements. A few photos and bank transfer records go a long way.

When is the capital gains tax due?

This is where people get caught out.

Capital gains tax is transactional. The clock starts on the date of sale, not at the end of the tax year. Under Section 93(3), you must file a Capital Gains Tax Return within one month of the realization. Under Section 82(2)(c)(i), the tax is payable on the same date the return is due.

So in our Gampaha example, if the transfer deed is signed on, say, June 12, your return and your Rs. 415,000 payment are both due by July 12.

Note that this is independent of your annual income tax return. If you sell a property and you also earn employment or business income, you'll end up filing two returns: one CGT return inside that thirty-day window, and your normal annual return for the year. Your quarterly tax payments on your other income carry on as usual.

Which property sales are exempt from capital gains tax?

Not every sale attracts the 10%. The three exemptions worth knowing about are:

1. Your principal place of residence. If you've owned the home for the three years immediately before the sale, and you've lived in it for at least two of those three years (on a daily-basis test), the gain is fully exempt. The exemption is for resident individuals only.
2. Small gains. A gain of Rs. 50,000 or less is exempt, as long as your total gains for the year don't exceed Rs. 600,000. This rarely helps with property, but it can apply to small disposals of other assets.
3. Listed shares. Gains from selling shares quoted on the Colombo Stock Exchange are fully exempt.

The principal residence exemption is the one most homeowners care about. The key word is "place of residence." A house you've rented out for the last two years won't qualify even if you used to live there. And the ownership and occupancy tests are both required, not either-or.

What's changing under the 2026 Amendment Bill?

The Inland Revenue (Amendment) Bill of 2026 proposes three changes that property sellers should know about. None are law yet, but they signal where things are heading.

• CGT rate rising from 10% to 15%. Clause 39(1) of the Bill updates the First Schedule rate. The new rate takes effect on the date the Bill is certified as an Act, so if your sale closes before that date, the 10% still applies.
• Mandatory TIN for property transactions, from April 1, 2026. You'll need to present your TIN Certificate to the Registrar-General to register land or title, and to the local authority for building plan approval. The same applies to share transfers in unlisted companies. If you've been putting off TIN registration, see our TIN guide.
• New exemption for gifts to the Government or a public university. A transfer to either is treated as a "non-taxing event," so no gain arises.

The bigger picture is that capital gains compliance is being tightened, not loosened. The TIN requirement in particular pulls property transactions firmly into the formal tax net, because no TIN means no registration, and no registration means no transfer.

How do I keep track of all this?

The administrative load on a property sale is annoyingly high. You need the original purchase price, every improvement receipt, every professional invoice from both sides of the transaction, and a clear paper trail of the sale itself. Then you have thirty days to assemble the CGT return and pay.

If you also earn employment or business income alongside your property holdings, our income tax calculation guide explains how the rest of your tax picture fits together. Landlords thinking about selling rental property should also read our rent relief guide for the income-side rules that apply while you still hold the asset.

Selling property isn't something most people do often, which is exactly why the rules feel unfamiliar. Take the thirty-day deadline seriously, keep your receipts from day one of ownership, and watch the 2026 Amendment Bill closely if you're planning a sale around the changeover. A bit of preparation turns a stressful month of paperwork into a single tidy return.