Bulgaria's 10% Flat Tax: The Complete Guide for Foreigners

Bulgaria has the lowest flat personal income tax in the European Union: 10%, with no progressive bands, no municipal income tax, no wealth tax, and a 5% tax on dividends. Corporate profit is also taxed at 10%. These rates have been stable since 2008 — and they survived a serious political test in late 2025, when a draft budget proposing to double the dividend tax was withdrawn after mass protests. As of 2026, with Bulgaria now inside both the eurozone and Schengen, the regime is unchanged and every figure below is in euros.

This guide covers what foreigners actually need: when you become a Bulgarian tax resident, what you pay as an employee, freelancer, or company owner, how social security works (including the mid-2026 threshold changes), and the special wrinkles for US and UK citizens. It pairs with our freelancer vs. EOOD comparison and the tax calculator.

The Headline Numbers (2026)

Are You a Bulgarian Tax Resident?

Tax residency — not citizenship, not your residence permit — determines whether Bulgaria taxes your worldwide income (resident) or only your Bulgarian-source income (non-resident). You are a Bulgarian tax resident if any of the following applies:

The 183-day rule

You spend more than 183 days in Bulgaria within any 12-month period. You become resident for the calendar year in which the 183rd day falls. Days of arrival and departure both count.

Center of vital interests

Your life is demonstrably centered in Bulgaria — family, home, employment or business, where your assets sit. This test can make you resident with fewer than 183 days of presence, and it is the one that matters for most relocating families. A permanent Bulgarian address alone does not make you resident if your center of vital interests is clearly elsewhere.

Treaty tie-breakers

Bulgaria has more than 70 double tax treaties. If both Bulgaria and your home country claim you, the treaty tie-breaker rules (permanent home, center of vital interests, habitual abode, nationality) decide. Get advice before assuming — the difference is whether your worldwide income lands in the 10% system or not.

Two quick examples

• A German employee moves to Sofia in March and keeps working remotely for her German employer. She crosses 183 days in September — Bulgarian tax resident for that entire calendar year, with the treaty tie-breakers sorting out the overlap months against Germany.
• A British consultant spends only 150 days a year in Bansko, but his wife, house, and main clients are in Bulgaria. Day-counting says non-resident; center of vital interests says resident — and the NRA would agree.

Practical note: obtaining a Bulgarian tax residency certificate from the NRA (National Revenue Agency) is routine once you genuinely live here, and it is the document your old tax authority will want to see. Your path to living here legally — residence permits, the D visa, or simply EU-citizen registration — is a separate track from tax residency, but the two usually converge in year one.

Before You Arrive: Exit Your Old System Cleanly

Becoming Bulgarian-resident is only half the move. The other half is leaving properly:

• UK: file form P85 or note your departure in Self Assessment, mind the Statutory Residence Test, and watch the temporary non-residence rules if you plan to realize gains while abroad.
• US: there is no exit — citizens file federally forever (see the US section below). But do break state residency: California, Virginia, and a few other sticky states will keep claiming you if you retain a driver's license, voter registration, or mailing address.
• EU countries: most have a formal deregistration procedure. Do it, or your old tax office will assume you never left. Bulgaria's tax residency certificate is your evidence in any later dispute.

Employees: What 10% Really Means

Employment income is taxed at 10% after deducting the employee's share of social security. Social security contributions in 2026 total around 33% of gross salary, split roughly:

The crucial feature: contributions apply only up to the maximum insurable income — €2,111.64 per month from January to July 2026, raised to €2,300 from August 1, 2026 (State Social Security Budget Act, State Gazette No. 68/2026). Above the cap, you pay only the 10% tax. The minimum wage, for reference, is €620.20 in 2026.

Worked example, €3,000 gross per month (above the cap, from August 2026):

The higher your salary, the closer your total burden falls toward a pure 10% — the opposite dynamic of every progressive system in Western Europe.

Two negotiation notes. Bulgarian job offers always quote gross, so run the math above before comparing to a net figure from home. And if you are asking a foreign employer to hire you locally, remember their side: employer contributions add roughly 19% on top of gross up to the cap, which is still far below the employer burden in France or Germany — a genuinely easy sell.

Freelancers: The 7.5% Effective Rate

Registered freelancers (the "free professions" — consultants, developers, designers, translators, and so on) get Bulgaria's best-kept secret: statutory norm expenses. The law assumes 25% of your gross income was spent on costs, no receipts required. You are taxed on the remaining 75% — an effective rate of 7.5% on gross revenue, before social security.

Norm expense rates by income type:

Social security for the self-insured

Freelancers pay contributions as "self-insured persons": 27.8% (pension 14.8% + universal pension fund 5% + health 8%), or 31.3% if you opt into sickness and maternity cover. You choose a monthly base between the minimum and the cap:

You pay monthly advances on your chosen base, then an annual equalization recalculates contributions on your actual taxable income (after the 25% norm expenses), still capped at the maximum. Social security paid is deductible from your income tax base.

Worked example: freelancer earning €48,000 in a year

How the total burden falls as income rises (2026 rules, contributions at 27.8%, all-in including income tax):

The social security cap does the heavy lifting: past roughly €35,000 of gross income, every additional euro you earn is taxed at just 7.5%.

Registration is simple: within 7 days of starting activity you register in the BULSTAT register, then file quarterly advance tax (due April 30, July 31, and October 31 — no advance for Q4) and an annual return. Full comparison with running a company: freelancer vs. EOOD. Note that sole traders registered as "ET" are a different, rarely advisable legal form taxed at 15%.

Company Owners: 10% Corporate + 5% Dividends = 14.5%

A Bulgarian company (usually an EOOD — single-owner limited company) pays 10% corporate tax on profit; distributing the remainder as dividends costs another 5%. Combined effective rate on fully distributed profit:

Dividends paid to EU/EEA parent companies are exempt; dividends to individuals (resident or not) take the 5% withholding. There is no additional Bulgarian tax when a resident individual receives the dividend.

The 2026 budget scare — and why it matters

In November 2025, the draft 2026 budget proposed doubling the dividend tax to 10% and raising pension contributions by 2 percentage points. Tens of thousands protested in Sofia; the government withdrew the budget and the final 2026 laws dropped both increases — dividend tax stayed at 5% and contribution rates were left unchanged (only the insurable-income bases rose in August). The episode is worth knowing: Bulgaria's low-tax consensus is politically defended, but budget season is worth watching each November.

One caveat for big fish: Bulgaria applies the EU Pillar Two rules, so multinational groups with consolidated revenue above €750 million face a 15% minimum effective rate. Individuals and normal SMEs are untouched.

Other Taxes You Should Know About

Property running costs and the buying process are covered in buying property in Bulgaria; day-to-day prices in the cost of living guide.

VAT for service exporters

If you invoice EU businesses for services, the invoices usually go out under the reverse-charge mechanism with no Bulgarian VAT — but a light-touch VAT registration (separate from the €51,130 kind) is required before your first cross-border B2B invoice. Your accountant files it in a day; forgetting it is a common and fixable slip.

Rental income in practice

A resident landlord collecting €600 a month declares €7,200 for the year, deducts the flat 10% norm expenses, and pays 10% on €6,480 — €648, with quarterly advance payments during the year. No receipts, no depreciation schedules.

Capital gains in practice

Sell the Sofia apartment you have lived in for four years: exempt. Sell a rental flat after two years: 10% on the gain. Sell ETFs on a regulated EU/EEA exchange: exempt — one of Bulgaria's most underrated features for investors. Sell US-listed shares: taxable at 10%, because a US exchange is not an EU/EEA regulated market.

Crypto in practice

Gains are ordinary income at 10%, calculated per disposal, with no long-term holding exemption. Occasional investors just pay the 10% through the annual return; high-frequency trading risks being classified as business activity, which brings social security into play.

Families

Bulgaria taxes individuals, not households — there is no joint filing. A modest child tax relief exists (in recent years a deduction of around €3,070 per child from the annual tax base, worth around €307 in saved tax), claimable by one parent through the annual return or December payroll; the amount is re-voted with each budget, so confirm the current year's figure.

Special Notes for US Citizens

The US taxes citizens on worldwide income wherever they live, so Bulgaria's 10% is only half your equation:

• FEIE: the Foreign Earned Income Exclusion shields up to $132,900 of earned income for tax year 2026 (IRS inflation adjustment), if you pass the physical presence or bona fide residence test. Above that, the Foreign Tax Credit applies — but since Bulgaria's 10% is lower than most US brackets, high earners often owe a US top-up.
• FBAR and FATCA: report foreign accounts exceeding $10,000 aggregate (FBAR/FinCEN 114); Bulgarian banks report US persons under the US-Bulgaria FATCA agreement, and some are sniffy about opening accounts for Americans — see opening a bank account in Bulgaria.
• No totalization agreement: the US and Bulgaria have no social security totalization treaty. Self-employed US citizens freelancing in Bulgaria can therefore face US self-employment tax (15.3%) on top of Bulgarian contributions. This is the single biggest reason American freelancers here take structuring advice — often operating through an EOOD and paying themselves differently. Do not skip a US expat tax professional.
• Tax treaty: the US-Bulgaria income tax treaty has been in force since 2008; its savings clause preserves the US right to tax its citizens, so its practical use for individuals is limited.
• PFIC trap: avoid EU-domiciled index funds (UCITS ETFs) — the US treats them as PFICs, and the punitive reporting erases Bulgaria's tax advantages on investments. US-domiciled funds keep things clean.

Special Notes for UK Citizens

• The UK-Bulgaria double tax treaty (2015) allocates taxing rights cleanly. Once you are Bulgarian-resident and pass the UK Statutory Residence Test as non-resident, most income shifts to Bulgarian taxation at 10%/5%.
• Pensions: under Bulgarian law, state and mandatory social-security pensions — Bulgarian or foreign, including the UK State Pension — are exempt from Bulgarian tax. Private and occupational pension income may be taxable at 10%; get advice on drawdown timing before you move. Details for retirees in retiring in Bulgaria.
• UK rental income stays taxable in the UK first, with Bulgaria giving treaty relief.
• Consider voluntary Class 2 or Class 3 National Insurance contributions to keep your UK State Pension building while you live here — cheap insurance that many movers forget.
• Post-Brexit, UK citizens need a D visa and residence permit to live here — tax residency then follows the normal rules above.

Registering with the NRA and Filing

• Get your number. Your residence permit comes with a personal number (LNCh/EGN) that doubles as your tax ID; others receive an official NRA number. See the ID card guide.
• Get a PIK code. A free personal access code from any NRA office unlocks the (surprisingly good) online portal — file returns, check balances, download certificates.
• Freelancers: register in BULSTAT within 7 days of starting activity, then self-insure from month one.
• Employees: your employer withholds everything; most employees never file a return unless they have other income.

Deadlines (2026 rules)

The tax year is the calendar year, with no option to vary it.

Penalties

Late filing of a personal return draws a fine of up to around €255 for a first offense (more for repeats), plus statutory interest on unpaid tax — the Bulgarian National Bank base rate plus 10 percentage points, roughly 12% a year at 2026 rates. Understating income gets expensive faster: penalties can reach a substantial share of the tax due. The NRA has modernized aggressively — bank data, cross-border reporting (CRS/DAC), and the euro changeover audit trail all feed it — so the era of casual non-declaration is over. File; at 10%, compliance is the cheapest in Europe.

Paying is mundane: taxes go by bank transfer to the NRA's IBANs (your banking app will have the templates), and the accountant ecosystem is priced for locals — €30-80 per month covers a freelancer, €100-200 a small company, and one-off return preparation €50-150. English-speaking accountants are plentiful in Sofia and work remotely for clients anywhere in the country.

Common Mistakes Foreigners Make

1. Confusing the residence permit with tax residency — the permit neither makes you tax-resident nor protects you from becoming one. The 183-day and vital-interests tests run on their own.
2. Freelancing for months before registering in BULSTAT, then facing back-dated social security with interest.
3. Skipping quarterly advance tax on the theory that the annual return covers it. It does not; the advances are their own obligation.
4. US citizens discovering self-employment tax after a year of Bulgarian freelancing — the missing totalization agreement is expensive to learn about retroactively.
5. Letting health contributions lapse between jobs — miss more than three monthly payments and your public health cover suspends until you clear the debt.
6. Assuming treaty relief is automatic. If your old country withheld tax on dividends or royalties that the treaty assigns to Bulgaria, you must claim the relief or reduced rate — nobody nets it off for you.
7. Worrying about transferring savings. Moving your own money into Bulgaria is not a taxable event; only income is taxed.

The Bottom Line

For employees, Bulgaria means keeping around 78-80% of gross pay. For freelancers, the norm-expense system plus the contribution cap pushes total burdens as low as 14%. For business owners, 14.5% on distributed profit is the EU's most competitive mainstream rate — and all of it sits inside the eurozone, inside Schengen, with treaty networks that make the arithmetic defensible back home. The system rewards one thing above all: registering properly and filing on time.

Frequently asked questions

If I spend under 183 days in Bulgaria, do I owe any Bulgarian tax?

Only on Bulgarian-source income (local employment, rent from Bulgarian property, fees from Bulgarian clients in some cases) — and center-of-vital-interests can still make you resident despite low day counts if your life is anchored here.

Is Bulgaria's 10% flat tax likely to survive?

It has held since 2008 and survived the 2025-26 budget fight with its dividend-tax and contribution hikes withdrawn under public pressure. Nothing is forever, but no major party currently proposes touching the 10% itself.

Do digital nomads owe Bulgarian tax?

If you become tax-resident (183 days or vital interests), yes — on worldwide income, usually at the freelancer rates above, which is precisely why many choose to. See the digital nomad guide.

What is the total burden for a well-paid freelancer?

With the 25% norm expenses and the social security cap, total tax plus contributions lands around 14-21% of gross for incomes between €50,000 and €100,000 — run your numbers in the tax calculator.

Does Bulgaria tax foreign pensions?

State and mandatory social-security pensions are exempt. Private pension income may be taxed at 10% — cheaper than almost anywhere, but confirm your specific scheme with an accountant.

Is money I bring into Bulgaria taxed?

No. Transferring your own savings is not income. Banks may ask for source-of-funds paperwork under anti-money-laundering rules — an old tax return or a sale contract usually settles it.

Do I need to file a return if I only have a salary?

Generally no — employer withholding is final for Bulgarian employment income. You must file if you have freelance, rental, foreign, or investment income, or if you want to claim reliefs like the child deduction.

Have a situation this guide does not cover? Ask in our questions section.

This guide is general information, not tax or legal advice. Verify your situation with a licensed Bulgarian accountant or lawyer.

Sources

• National Revenue Agency of Bulgaria
• PwC Worldwide Tax Summaries — Bulgaria, Individual
• PwC Worldwide Tax Summaries — Bulgaria, Corporate
• National Social Security Institute (NSSI)
• IRS — Foreign Earned Income Exclusion