Most of the gap is opened by Ireland's Irish Non-Dom Remittance regime, which displaces the standard schedule. Both countries are indicated in USD at the displayed FX.
Both Ireland and Mexico operate on a worldwide-income basis, though each country's bracket structure and available regimes produce materially different outcomes. Ireland's top marginal rate of 40% is 5 percentage points above Mexico's 35%, making the statutory gap one of the largest variables in this comparison.
| Personal income tax progressive · top 40% | — |
| Social security 4.3% employee · uncapped | $4,275 |
| Total deductions | $4,275 |
| Gross income | $100,000 |
| Net take-home | $95,725 |
| Personal income tax progressive · top 35% | $26,271 |
| Social security 4.1% employee · uncapped | $4,100 |
| Total deductions | $30,371 |
| Gross income | $100,000 |
| Net take-home | $69,629 |
On a $100k single-resident employment profile under each country's default schedule, Ireland produces the lower effective burden at 30.4% versus 30.4% in Mexico — a 0 percentage-point gap that compounds to roughly $9 of additional take-home annually. The 5-point spread in top statutory rates is the primary driver; above their respective thresholds, each additional dollar is taxed at 40% in Ireland but only 35% in Mexico. The narrow effective-rate gap means the decision between the two countries is unlikely to rest on the default schedule alone — regime availability, cost of living, and social-security treatment will be the tiebreakers.
| Instrument | Ireland · USD | Mexico · USD | Δ (MX − IE) |
|---|---|---|---|
I. Personal income tax | |||
Personal income tax IEprogressive · top 40%MXprogressive · top 35% | — | $26,271 | +$26,271 |
| subtotal · personal income tax | $0 | $26,271 | +$26,271 |
II. Mandatory social security & health | |||
PRSI 4.2% Jan-Sep, 4.35% Oct → midpoint. USC is a separate income-tax-adjacent surcharge, not included here. IE4.3% · uncappedMX— | $4,275 | — | −$4,275 |
IMSS + AFORE ~4.1%. IE—MX4.1% · uncapped | — | $4,100 | +$4,100 |
| subtotal · mandatory social security & health | $4,275 | $4,100 | −$175 |
| Total deductions | $4,275 | $30,371 | +$26,096 |
| Effective rate | 4.3% | 30.4% | 26.1 pp |
| Gross income | $100,000 | $100,000 | — |
| Net take-home | $95,725 | $69,629 | −$26,096 |
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: Ireland's Irish Non-Dom Remittance (30% flat) and Mexico's RESICO (Simplified Regime) (2% flat). On headline rate alone, Mexico's RESICO (Simplified Regime) at 2% beats the alternative at 30% — a 28-point advantage before eligibility is considered.
For a digital nomad or remote worker on a $100k income, Ireland edges Mexico by 0 percentage points on the default schedule — a real but not overwhelming difference that other variables may offset. Regime-eligible movers should check whether Mexico's RESICO (Simplified Regime) (2%) outperforms Ireland's default 30.4% effective rate — for qualifying applicants it often does.
Every line above can be traced to a primary instrument. We publish the model; you may toggle its parameters.
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