How taxes work in Timor-Leste: a complete guide for businesses (2026)

Timor-Leste's tax system was rebuilt from scratch in the years after independence. The government's design goal was simplicity — a flat rate, a short list of taxes, almost no exemptions. The result is one of the more navigable tax systems in the region, especially for small and mid-sized businesses.

This guide walks through every tax that can touch a Timor-Leste business — what it is, who owes it, when it's due, and what trips people up. It's written for the SME owner who's just been handed the books, for the finance officer wondering what the firm missed, and for the foreign investor running the numbers before flying in.

Most companies operating in Timor-Leste pay a flat 10% corporate income tax. On top of that there's a small handful of separate taxes — sales tax on imports, a service tax on hospitality and telecom, wage income tax on staff salaries, withholding tax on certain payments out, import duty on goods crossing the border, and social security on payroll. There's no VAT, no property tax, no stamp duty, no transfer tax, and no municipal income layer on top. The whole system rests on Law 8/2008 (the Tax and Duties Act) and UNTAET Regulation 2000/18, administered today by the Autoridade Tributária de Timor-Leste (ATTL) under the Ministry of Finance.

Most companies in Timor-Leste pay corporate income tax at a flat 10% on net profit. There's no progressive rate, no separate small-business band, and no distinction between resident and non-resident companies for the headline rate.

Two important exceptions live outside the general rule. Oil and gas contractors pay CIT at 30% and are also subject to a Supplemental Petroleum Tax under a separate formula. Oil and gas sub-contractors pay CIT at a flat 6%. The petroleum tax regime is its own world; for the rest of this guide, we are talking about the 10% rate that covers ordinary businesses.

A few details worth knowing. Capital gains are taxed at the same 10% as ordinary income — there's no separate capital-gains rate. Dividends paid by one Timor-Leste resident company to another are tax-exempt in the receiving entity's hands. The annual CIT return is due by the last day of the third month after year-end (so 31 March for a December year-end). Larger businesses pay in quarterly instalments through the year rather than in one lump.

Sales Tax in Timor-Leste does something narrower than VAT does in most other countries. The rate is 2.5% on taxable goods imported into Timor-Leste and 0% on the sale of goods and services inside the country. Importers pay at the border; domestic transactions move through tax-free.

There's no input/output credit mechanism — a domestic business doesn't reclaim sales tax paid on imports against sales tax charged on outputs, because there's no sales tax charged on outputs. In effect, the 2.5% on imports is more like a low import-stage levy than a value-added tax.

The country has chosen not to adopt VAT. The reasons are practical — VAT systems are expensive to administer and require capable accounting at every link in the supply chain. For a small open economy where many businesses are micro-scale, that calculus tips toward the simpler model. The trade-off is that the tax base for sales taxation is narrower, and the government leans more heavily on income tax and petroleum revenues than a VAT country would.

Service Tax is a 5% tax on a specific category of services — hotel and accommodation, restaurant and bar, and telecommunications. It applies when the gross consideration for those services exceeds USD 500 per month.

Two things catch people out. The first is the gross threshold — it's not net of costs or discounts. If your monthly hospitality billings cross USD 500 in gross revenue, the 5% applies on the full taxable amount, not on the portion above the threshold. The second is the narrow category — Service Tax does not apply to professional services, consulting, construction, or most other services. Those sit under other regimes (Withholding Tax, in many cases — see the withholding section below).

Service Tax is filed and paid monthly, by the 15th of the following month, alongside the other monthly tax obligations. A hospitality or telecom business below the USD 500 monthly threshold has no Service Tax obligation, but should still register with ATTL.

Wage Income Tax is what the employer withholds from each employee's pay and remits to the tax authority each month. It is the most operationally heavy tax for most businesses, simply because it happens every payroll cycle.

For Timor-Leste residents, the rate is 0% on the first USD 500 of monthly salary, and 10% on the portion above USD 500. So an employee earning USD 800 a month has WIT of USD 30 (10% of USD 300) withheld. An employee earning USD 500 or less has no WIT withheld at all. A resident, for WIT purposes, is someone present in Timor-Leste for 183 days or more in any 12-month period — or a government employee posted abroad.

For non-residents, the rate is a flat 10% on the total monthly salary, with no tax-free threshold.

Operationally, the employer files a Monthly Taxes Form in three copies and delivers it with the payment to Banco Nacional Ultramarino (BNU) by the 15th of the following month. At year-end, the employer also files an Annual Employer Wage Income Tax Withholding Form by 31 March (or the next business day if 31 March falls on a weekend or holiday).

This is wages only. Social Security is a separate obligation, with its own rates and its own administrator — covered next.

Timor-Leste's mandatory social security regime was introduced in November 2016. Any tax guide that doesn't mention it — and a lot of older guides still don't — is incomplete.

The total contribution is 10% of the contribution base, split 6% from the employer and 4% from the employee. Social Security is administered by INSS (Instituto Nacional de Segurança Social), not by ATTL — different forms, different filings, different office.

The contribution base is broader than just the monthly base salary. It includes the base salary, the 13th-month subsidy, performance-related remuneration, supplements for night work, shift work, or remote work, supplements for special careers, other supplements tied to the activity, and severance paid for dismissal without just cause. It excludes per diems for travel, meals, and accommodation, overtime hours, bonuses and profit-sharing, food subsidies and extraordinary subsidies, and representation expenses.

There's also a voluntary contribution regime for the self-employed and for people not in mandatory employment. Voluntary contributors pay the full 10% themselves and choose one of 20 contribution brackets, anchored to the social pension value. The coverage spans work-injury, maternity, old-age, and death benefits.

Withholding Tax is the easiest tax to overlook, because it's a tax the business deducts when it pays someone else — most often a contractor, a service provider, or a non-resident. The paying business holds the tax back and remits it to ATTL; the recipient receives the net amount.

The headline rates: 10% on payments of Timor-Leste-source income to non-residents, 10% on royalty payments, and a schedule of rates that vary by payment type for resident recipients — construction services, professional services, rental of certain assets each have their own rate under Law 8/2008.

WHT is filed and paid monthly, by the 15th of the following month, alongside Sales Tax, Service Tax, and WIT.

The classic trap: paying a subcontractor or a non-resident professional without withholding. If the paying business doesn't withhold when it should have, ATTL can pursue the full tax — and any penalties — from the paying business, not from the recipient. Getting this right is a contracting-discipline question as much as it is a tax question.

Goods crossing the border into Timor-Leste are subject to import duty at 5% of the customs value, in addition to any sales tax owed at the import stage. The Customs Authority administers this — a separate agency from ATTL.

Certain categories of goods also carry a Selective Consumption Tax (excise). Excise typically applies to tobacco, alcoholic beverages, fuels, and some vehicles, with rates that vary by category and by specific tariff code. Specific exemptions exist for some medical, humanitarian, and agricultural-input categories under particular decrees.

For most ordinary imports — equipment, supplies, office goods — the 5% import duty plus the 2.5% sales tax (so roughly 7.5% combined) is what to budget for. For excisable goods, the all-in landed cost can be substantially higher, and the right answer depends on the specific tariff code.

It's easy to focus on the taxes that exist. It's worth pausing on what Timor-Leste doesn't tax — because the absences tell you as much about how the system is designed as the presences do.

There is no property tax — no annual levy on the value of land or buildings. There is no transfer tax on the sale or transfer of property. There is no stamp duty on contracts, share transfers, or legal instruments. There is no municipal or local income tax layered on top of the central CIT. There is no separate inheritance or gift tax. There is no net wealth tax. Dividends from Timor-Leste resident companies are tax-exempt in the hands of resident recipients. Capital gains are taxed as ordinary income at 10%, not at a separate (typically higher) capital-gains rate.

The net effect for a business operating cleanly in Timor-Leste is that once corporate income tax, wage income tax, and the relevant withholding obligations are met, there isn't a long list of secondary taxes to track. That simplicity is one of the country's quiet competitive advantages.

There are really only two cadences to remember.

Monthly taxes — Sales Tax, Service Tax, Wage Income Tax, Withholding Tax, and the relevant excise filings — are due by the 15th of the following month. Miss a 15th, and the late-filing penalty starts running immediately.

Annual taxes — Corporate Income Tax and the Annual Employer Wage Income Tax Withholding Form — are due by the last day of the third month after year-end. For a calendar year-end (31 December), that means 31 March. If a deadline falls on a weekend or public holiday, it moves to the next business day.

Payments flow through Banco Nacional Ultramarino (BNU) or, increasingly, through ATTL's electronic payment system (P24). Social Security contributions are a separate channel through INSS.

Five patterns turn up at audit across small and mid-sized businesses again and again.

Service Tax calculated against net consideration instead of gross. The USD 500 monthly threshold and the 5% rate both apply to gross billings — discounts and costs don't reduce the base. A hospitality business under the threshold by net measure but over it by gross will, on review, owe back tax plus penalties.

Subcontractor and professional-service payments made without withholding tax deducted. The recipient invoices the gross; the payer wires the gross; nobody withholds. Six months later at audit, ATTL pursues the paying business — not the recipient — for the WHT that should have been remitted at source.

Monthly deadlines missed because there's no automated reminder. ATTL doesn't push the 15th-of-the-month reminders that some neighbouring countries' tax systems do. Without an internal calendar discipline, the months drift, and the penalties accumulate quietly.

Wage Income Tax and Social Security treated as the same obligation. They have different rates, different contribution bases, and different administrators (ATTL for WIT, INSS for Social Security). Conflating them produces under-contribution that is usually only caught at audit or when an employee files a claim.

Annual corporate income tax filed without retained supporting documentation. The return goes in on time, then the underlying invoices and bank reconciliations sit in someone's drawer. When ATTL queries a deduction two years later, the deduction gets disallowed and the tax bill grows.

The penalty framework sits in Law 8/2008 (the Tax and Duties Act), with reference to UNTAET Regulation 2000/18 for the older infrastructure that's still in force. Across late filing, late payment, and under-reporting, the pattern is consistent: a percentage fine on the tax owed, plus monthly interest on the unpaid balance until the position is settled. Wilful evasion is treated more severely than simple late filing.

In practice, the best protection isn't memorising the schedule — it's filing on time, retaining the supporting documentation behind every return, and asking ATTL or your accountant early when something looks ambiguous. Late penalties are recoverable. Lost records usually aren't.

This is what we do every day. Bookkeeping and payroll for businesses across Dili, monthly tax filings, annual corporate returns, audit engagements, and full setup support for new ventures and foreign investors. We've been doing it since 2013.

The whole point of Primos Bo'ot is that you don't have to learn this guide in detail. You can — and you should know enough to ask good questions — but the operational discipline of getting every filing right, every month, is what we handle so you don't have to.

If any of this is sitting unanswered in your business, book a free 30-minute consultation. We'll tell you what's done, what's missing, and what it would take to get the rest in order.