Most of the gap is opened by United States's Foreign Earned Income Exclusion regime, which displaces the standard schedule. Both countries are indicated in USD at the displayed FX.
Bulgaria taxes residents on worldwide income, while United States taxes its citizens on worldwide income regardless of residence — a structural difference that shapes how each country treats foreign-source income. United States's top marginal rate of 37% is 27 percentage points above Bulgaria's 10%, making the statutory gap one of the largest variables in this comparison.
| Personal income tax progressive · top 10% | $10,000 |
| Social security 13.8% employee · capped | $3,794 |
| Total deductions | $13,794 |
| Gross income | $100,000 |
| Net take-home | $86,206 |
| Personal income tax feie · 0% flat | — |
| Social security 22.9% employee · capped | $7,650 |
| Total deductions | $7,650 |
| Gross income | $100,000 |
| Net take-home | $92,350 |
On a $100k single-resident employment profile under each country's default schedule, Bulgaria produces the lower effective burden at 13.8% versus 24.4% in United States — a 10.6 percentage-point gap that compounds to roughly $10,568 of additional take-home annually. The 27-point spread in top statutory rates is the primary driver; above their respective thresholds, each additional dollar is taxed at 37% in United States but only 10% in Bulgaria. Social-security contributions also differ: Bulgaria charges 13.8% versus 7.6% in United States, adding a second layer to the effective-rate spread that doesn't show in the income-tax brackets alone. The gap widens at higher incomes as marginal rates diverge further; remote workers earning above $150k or $200k should run the full engine scenario with their actual figures for a more precise read.
| Instrument | Bulgaria · USD | United States · USD | Δ (US − BG) |
|---|---|---|---|
I. Personal income tax | |||
Personal income tax BGprogressive · top 10%USfeie · 0% flat | $10,000 | — | −$10,000 |
| subtotal · personal income tax | $10,000 | $0 | −$10,000 |
II. Mandatory social security & health | |||
~13.78% (pension 8.78% + health 3.2% + others). Cap BGN 4,130/mo → annual BGN 49,560. BG13.8% · capped лв49,560US— | $3,794 | — | −$3,794 |
FICA 6.2% SS (cap $184,500) + 1.45% Medicare (uncapped). Additional 0.9% Medicare above $200k not modeled. BG—US7.6% · capped $184,500 | — | $7,650 | +$7,650 |
SECA: both employer + employee portions paid by SE. BG—US15.3% · capped $184,500 | — | — | — |
| subtotal · mandatory social security & health | $3,794 | $7,650 | +$3,856 |
| Total deductions | $13,794 | $7,650 | −$6,144 |
| Effective rate | 13.8% | 7.6% | -6.1 pp |
| Gross income | $100,000 | $100,000 | — |
| Net take-home | $86,206 | $92,350 | +$6,144 |
Table 1 · Statutory deductions, single-filer remote worker, FY2026 indicative. All amounts in USD. n/a where instrument does not apply. | |||
United States offers the Foreign Earned Income Exclusion (flat 0% on qualifying income) for qualifying incoming residents; Bulgaria has no equivalent ICP-targeted regime currently modelled — new residents there enter the standard Bulgaria schedule immediately. For movers who don't qualify for United States's Foreign Earned Income Exclusion, both countries revert to their default progressive schedules, where Bulgaria's lower top rate still gives it a structural edge.
For a digital nomad or remote worker on a $100k income, Bulgaria edges United States by 10.6 percentage points on the default schedule — a real but not overwhelming difference that other variables may offset. The calculus shifts if the Foreign Earned Income Exclusion is available: eligible movers may find United States the stronger play once the regime replaces the default schedule. Bulgaria taxes residents on worldwide income, so the headline effective rate applies to total global earnings — not just locally-sourced pay.
Every line above can be traced to a primary instrument. We publish the model; you may toggle its parameters.
Read the full note ↗