Most of the gap is opened by South Africa's Foreign Employment Income Exemption (s10(1)(o)(ii)) regime, which displaces the standard schedule. Both countries are indicated in USD at the displayed FX.
Costa Rica uses a territorial system — only locally-sourced income enters the tax base, while South Africa taxes residents on worldwide income — a structural difference that shapes how each country treats foreign-source income. South Africa's top marginal rate of 45% is 20 percentage points above Costa Rica's 25%, making the statutory gap one of the largest variables in this comparison.
| Personal income tax dn_visa · 0% flat | — |
| Social security 10.7% employee · uncapped | $10,670 |
| Total deductions | $10,670 |
| Gross income | $100,000 |
| Net take-home | $89,330 |
| Personal income tax s10_o_ii · 0% flat | $8,263 |
| Social security 1.0% employee · uncapped | $1,000 |
| Total deductions | $9,263 |
| Gross income | $100,000 |
| Net take-home | $90,737 |
On a $100k single-resident employment profile under each country's default schedule, Costa Rica produces the lower effective burden at 28.3% versus 35.7% in South Africa — a 7.4 percentage-point gap that compounds to roughly $7,371 of additional take-home annually. The 20-point spread in top statutory rates is the primary driver; above their respective thresholds, each additional dollar is taxed at 45% in South Africa but only 25% in Costa Rica. Costa Rica levies a social-security contribution on employment income; South Africa does not model one in the engine, so the bracket comparison here is relatively clean for South Africa. 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 | Costa Rica · USD | South Africa · USD | Δ (ZA − CR) |
|---|---|---|---|
I. Personal income tax | |||
Personal income tax CRdn_visa · 0% flatZAs10_o_ii · 0% flat | — | $8,263 | +$8,263 |
| subtotal · personal income tax | $0 | $8,263 | +$8,263 |
II. Mandatory social security & health | |||
CCSS ~10.67%. CR10.7% · uncappedZA1.0% · ceiling applies | $10,670 | $1,000 | −$9,670 |
| subtotal · mandatory social security & health | $10,670 | $1,000 | −$9,670 |
| Total deductions | $10,670 | $9,263 | −$1,407 |
| Effective rate | 10.7% | 9.3% | -1.4 pp |
| Gross income | $100,000 | $100,000 | — |
| Net take-home | $89,330 | $90,737 | +$1,407 |
Table 1 · Statutory deductions, single-filer remote worker, FY2026 indicative. All amounts in USD. n/a where instrument does not apply. | |||
Both countries offer dedicated regimes for incoming professionals: Costa Rica's Costa Rica Digital Nomad Visa (0% flat) and South Africa's Foreign Employment Income Exemption (s10(1)(o)(ii)) (0% flat). The two regime rates are nearly identical (0% vs 0%), so eligibility criteria and duration will determine which is more accessible rather than the rate itself.
For a digital nomad or remote worker on a $100k income, Costa Rica edges South Africa by 7.4 percentage points on the default schedule — a real but not overwhelming difference that other variables may offset. Regime-eligible movers should check whether South Africa's Foreign Employment Income Exemption (s10(1)(o)(ii)) (0%) outperforms Costa Rica's default 28.3% effective rate — for qualifying applicants it often does. Costa Rica's territorial system means foreign-source income stays off the resident tax base entirely — a structural advantage for nomads paid by overseas clients that no rate comparison fully captures.
Every line above can be traced to a primary instrument. We publish the model; you may toggle its parameters.
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