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Marginal Tax Rate Calculator (Australia)
Marginal Tax Rate Calculator
True Marginal Rate (incl. Medicare)
32%
Rate Analysis
Your top marginal rate is 30.0% while your effective rate across all income is 19.2% — the gap shows how the progressive system shields your earlier dollars. Including the 2% Medicare Levy, your next dollar is taxed at about 32.0 cents.
*Estimated using ATO 2024-25 resident and foreign-resident brackets, the 2% Medicare Levy and 2024-25 Medicare Levy Surcharge thresholds. Excludes tax offsets, HELP repayment obligations, Division 293 super tax, and the low-income Medicare reduction. Educational only, not tax advice.
Why Your Marginal Rate Runs Every Financial Decision
Your marginal tax rate is the tax you pay on your next dollar of income — and in Australia it quietly sets the price of almost every financial move you make. Salary-sacrificing into super, negatively gearing a property, realising a capital gain, or franking a dividend all get valued against that top-of-stack rate. Under the Stage 3 brackets, residents pay nothing below $18,200, then 16%, 30%, 37% and finally 45% above $190,000. But the bracket rate is only the start: the 2% Medicare Levy rides on top of nearly every dollar of resident income, and higher earners without private hospital cover can add the Medicare Levy Surcharge — up to another 1.5% on their entire income. The gap between marginal and effective rates is where planning lives. A nurse on $85,000 sits in the 30% bracket but keeps most of her income taxed at 16% or less — her effective rate is far below her headline marginal rate. A surgeon at $210,000 pays 45 cents plus 2% Medicare on each extra dollar, which is precisely why concessional super contributions (taxed at 15%) save 32 cents on the dollar for him and only 15 cents for her. This calculator rebuilds the marginal-rate picture for Australian residents and foreign residents. It walks your taxable income through the ATO brackets, adds the Medicare Levy, tests the Medicare Levy Surcharge thresholds (including family status and private hospital cover), and reports the true marginal rate — the number that should anchor your salary-sacrifice, gearing and capital-gains decisions. Foreign residents get their own treatment: no tax-free threshold, a 30% rate from the first dollar, and no Medicare Levy at all.
ATO Brackets, the Medicare Levy and the MLS
Income tax is computed bracket by bracket: each slice of your taxable income is taxed at its own rate, so a $95,000 earner pays 16% only on the slice between $18,201 and $45,000, 30% on the slice up to $95,000, and nothing on the first $18,200. The marginal rate is the rate of the bracket your last dollar lands in. Foreign residents use a separate schedule — 30% from the very first dollar up to $135,000, then 37% and 45% — with no tax-free threshold and no Medicare Levy, which is why working-holiday and fly-in-fly-out non-residents often face a different optimum for salary sacrifice. The Medicare Levy adds a flat 2% of taxable income for residents. (Low-income earners get a shaded-in reduction that phases the levy out below roughly $27,000 for singles; the calculator shows the full 2% for planning simplicity.) The Medicare Levy Surcharge is the trap for higher earners: if your MLS income — taxable income plus reportable super contributions and reportable fringe benefits — exceeds $101,000 for singles or $161,000 for families and you do not hold an eligible private hospital policy, a surcharge of 1%, 1.25% or 1.5% applies to your entire MLS income, tiered at $134,000/$158,000 single and $214,000/$252,000 family. Crucially the surcharge is levied on the whole income, not just the excess, so crossing a threshold by $1 can cost over $2,000. The true marginal rate the tool reports stacks all three layers: your bracket rate, plus 2% Medicare, plus your current MLS tier where applicable. Effective rate — total tax divided by total income — shows the average bite, and the bracket-by-bracket breakdown shows exactly where each dollar went.
Expert Insights
Salary Sacrifice Math Is Your Marginal Rate Minus 15%
Concessional super contributions are taxed at 15% inside the fund, so every dollar sacrificed saves your marginal rate minus 15% — 30 cents on the dollar for a 45% earner including Medicare, but only 1 cent for anyone under the $45,000 line. Run your true marginal rate here before setting a sacrifice level, and remember Division 293 tax claws back an extra 15% once income exceeds $250,000, trimming but rarely eliminating the benefit.
The MLS Threshold Is a Cliff, Not a Slope
Because the surcharge applies to your whole income once you cross the base threshold, earning $102,000 without hospital cover costs about $1,020 in MLS while $100,000 costs nothing. Before turning down a raise or bonus, check which side of $101,000 (single) or $161,000 (family) it puts you on — an eligible hospital policy costing a fraction of the surcharge often wins, and it also unlocks the private health insurance rebate.
Capital Gains and Franking Ride on the Same Rate
Your marginal rate is the input to every investment tax decision: a discounted long-term capital gain is taxed at half your marginal rate, unfranked dividends at the full rate, and fully franked dividends carry a 30% credit that can be refunded if your marginal rate (including Medicare) sits below 30%. Knowing your true marginal rate tells you whether to realise gains in June or July, and whether franked or unfranked yield actually pays more after tax.
Actionable Tips
- 1
Test Every Threshold Before 30 June
Project your taxable income plus reportable super and fringe benefits before financial year end. If you are within a few thousand dollars of $101,000/$161,000 (MLS), $135,000 or $190,000 (bracket jumps), a pre-30 June salary-sacrifice or deduction — such as a personal super contribution or income protection premium — can drop you into a lower bracket or erase the surcharge entirely.
- 2
Compare Hospital Cover Against Your MLS Exposure
If the calculator shows an MLS bill at your income, price an eligible hospital policy against it. A policy costing $1,200 a year can erase a $2,500 surcharge, and the government's 25-34 age loading and rebate rules make earlier cover cheaper. Just confirm the policy is hospital cover with an excess of $750 or less ($1,500 couples) — extras-only cover does not stop the surcharge.
- 3
Use Your True Rate for Gearing Decisions
Negative gearing refunds interest at your true marginal rate, so the same $10,000 of deductible interest is worth $4,700 back at 47% but only $3,000 at 30%. Enter your actual marginal rate here before sizing any geared position — and remember the deduction only pays if the underlying investment eventually makes money after tax.
Real-World Examples
Emma Dodged a $2,100 Surcharge
Emma, a radiographer, was offered a $6,000 pay rise taking her to $104,000 — right past the $101,000 MLS base threshold with no hospital cover. The calculator showed the raise would trigger a 1% surcharge on her whole income: $1,040 and climbing. She bought a compliant hospital policy for $980 a year instead, kept the raise, and her net position improved by more than the policy cost.
Raj Sacrificed to the Bracket Edge
Raj earned $148,000, squarely in the 37% bracket. Sacrificing $13,000 into super dropped his taxable income to $135,000 — the 30% bracket line — saving 37% minus the fund's 15% on every sacrificed dollar, about $2,860 a year in net tax. The calculator's bracket breakdown showed exactly where each dollar landed and confirmed his take-home fell by far less than the contribution.
Sophie's Working-Holiday Surprise
Sophie, a UK citizen on a temporary visa, assumed she had a tax-free threshold like her housemates. As a foreign resident her first $135,000 is taxed at 30% from dollar one, with no Medicare Levy. Re-planning with the correct schedule, she increased her deductible super contribution instead of relying on the threshold that never applied — and avoided a nasty assessment surprise at tax time.
Glossary of Terms
- Marginal Tax Rate
- The rate of tax paid on your next dollar of taxable income, set by the ATO bracket that dollar lands in.
- Medicare Levy
- A flat 2% of taxable income paid by most Australian residents to fund Medicare, in addition to bracket income tax.
- Medicare Levy Surcharge (MLS)
- An extra 1-1.5% levied on the entire MLS income of residents earning above $101,000 (single) or $161,000 (family) who lack eligible private hospital cover.
- Tax-Free Threshold
- The first $18,200 of resident taxable income, taxed at 0% — unavailable to foreign residents.
Frequently Asked Questions
Everything you need to know about this topic.
Ivy Sinclair-Wren
Financial Chaos Analyst
Ivy Sinclair-Wren is a Financial Chaos Analyst covering investing, AI, wealth psychology, and the emotional consequences of opening finance apps during market crashes. Based in Melbourne, she specializes in demystifying the Australian tax code and helping users navigate the intersection of spreadsheet logic and human irrationality.