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 Australia and Ireland operate on a worldwide-income basis, though each country's bracket structure and available regimes produce materially different outcomes. Australia's top marginal rate of 45% is 5 percentage points above Ireland's 40%, making the statutory gap one of the largest variables in this comparison.
| Personal income tax progressive · top 45% | $24,722 |
| Social security 2.0% employee · uncapped | $2,000 |
| Total deductions | $26,722 |
| Gross income | $100,000 |
| Net take-home | $73,278 |
| 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 |
On a $100k single-resident employment profile under each country's default schedule, Australia produces the lower effective burden at 26.7% versus 30.4% in Ireland — a 3.6 percentage-point gap that compounds to roughly $3,640 of additional take-home annually.
| Instrument | Australia · USD | Ireland · USD | Δ (IE − AU) |
|---|---|---|---|
I. Personal income tax | |||
Personal income tax AUprogressive · top 45%IEprogressive · top 40% | $24,722 | — | −$24,722 |
| subtotal · personal income tax | $24,722 | $0 | −$24,722 |
II. Mandatory social security & health | |||
Medicare Levy +2% of taxable income. Superannuation is employer-paid. AU2.0% · uncappedIE4.3% · uncapped | $2,000 | $4,275 | +$2,275 |
| subtotal · mandatory social security & health | $2,000 | $4,275 | +$2,275 |
| Total deductions | $26,722 | $4,275 | −$22,447 |
| Effective rate | 26.7% | 4.3% | -22.4 pp |
| Gross income | $100,000 | $100,000 | — |
| Net take-home | $73,278 | $95,725 | +$22,447 |
Table 1 · Statutory deductions, single-filer remote worker, FY2026 indicative. All amounts in USD. n/a where instrument does not apply. | |||
Ireland offers the Irish Non-Dom Remittance (flat 30% on qualifying income) for qualifying incoming residents; Australia has no equivalent ICP-targeted regime currently modelled — new residents there enter the standard Australia schedule immediately. For movers who don't qualify for Ireland's Irish Non-Dom Remittance, both countries revert to their default progressive schedules, where Australia's lower top rate still gives it a structural edge.
For a digital nomad or remote worker on a $100k income, Australia edges Ireland by 3.6 percentage points on the default schedule — a real but not overwhelming difference that other variables may offset. The calculus shifts if the Irish Non-Dom Remittance is available: eligible movers may find Ireland the stronger play once the regime replaces the default schedule.
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