Glossary
The Medicare Levy Surcharge is an extra 1 to 1.5 percent tax on higher incomes without private hospital cover, paid on top of the standard 2 percent levy. It exists to push you into hospital cover, and the decision maths decides whether that push is worth it.
The Medicare Levy Surcharge is an additional levy of 1, 1.25 or 1.5 percent of income, depending on the tier. It is charged to taxpayers who do not hold private hospital cover and whose income for MLS purposes exceeds the thresholds. The surcharge sits on top of the standard 2 percent Medicare levy, on the same tax return. The income test is the add-back family: taxable income plus reportable fringe benefits, reportable super contributions and net investment losses - which is why salary sacrifice does not dodge it.
For 2025-26, singles pay no surcharge up to $101,000 of income for MLS purposes. The rates then run 1 percent to $118,000, 1.25 percent to $158,000, and 1.5 percent above $158,000. The family thresholds start at $202,000, plus $1,500 for each dependant child after the first. Only hospital cover counts - extras alone do not avoid the surcharge. The thresholds are indexed each year.
The mechanics run through the tax return. Income for MLS purposes is calculated first: taxable income, plus reportable fringe benefits, plus reportable super contributions, plus net investment losses added back. The total is tested against the tier thresholds, and the surcharge rate - 1, 1.25 or 1.5 percent - applies to the whole of that income if no hospital cover was held. A $130,000 income in the 1.25 percent tier owes $1,625 of surcharge on top of the standard levy.
The decision maths is the part worth running. Basic hospital cover costs roughly $1,500 to $1,800 a year. Against a $130,000 income, the $1,625 surcharge and a $1,700 policy are roughly break-even; against a $200,000 income at the 1.5 percent tier, the $3,000 surcharge loses to the policy by roughly $1,300; against a $105,000 income, the $1,050 surcharge is cheaper than any policy. The surcharge is not always the more expensive option - the arithmetic decides, tier by tier.
The surcharge also interacts with the Lifetime Health Cover loading, which is the separate 2-percent-per-year penalty for taking up hospital cover after 30. The surcharge pushes from the tax return; the loading waits outside it. The australian income tax calculator runs the surcharge inside the full picture, and the take-home pay calculator shows where the levy and the surcharge land in the net pay.
For an Australian reader, the surcharge is the tax-return decision that has an insurance product attached to it: hold hospital cover, or pay 1 to 1.5 percent of your income for the privilege of not holding it. The ATO calculates it on the return, the income test includes the add-backs most people forget, and the rate depends on the tier. The marginal tax rate entry covers the brackets the surcharge sits on top of, and the tier thresholds are indexed each year.
A colleague named Brent (yes, that Brent) earned $165,000, dismissed hospital cover as a waste of money, and paid the 1.5 percent surcharge - roughly $2,475 - at tax return time, on top of the standard levy. The invoice never arrived in the mail; it appeared in the assessment, which is why nobody budgets for it. The Lifetime Health Cover loading clock started the same year. The highest-leverage thing most Australians can do is run the tier maths before 30 June: the surcharge, the policy premium and the loading clock are one decision.
Income for MLS purposes is $130,000, which sits in the 1.25 percent tier for 2025-26. The surcharge is 1.25 percent of the whole income: $1,625, on top of the 2 percent Medicare levy of $2,600. A basic hospital policy at $1,700 a year is roughly break-even against the surcharge - and it comes with the cover. The decision is a rounding error away from either answer, and the tax return is where the bill lands - in the assessment, months after the decision was made.
The surcharge is 1.5 percent of $200,000: $3,000 a year, against a hospital policy at roughly $1,700. The policy wins by roughly $1,300 a year, and the Lifetime Health Cover loading - 2 percent per year over 30 - widens the gap every year the decision is deferred. At this tier the arithmetic is not close. The australian income tax calculator runs the comparison inside the full return, surcharge and all.
The surcharge is 1 percent of $105,000: $1,050 a year. The cheapest basic hospital policies run $1,500 and above, so the surcharge is the cheaper option by roughly $450 - the honest edge case the insurers do not advertise. Below roughly $110,000, paying the surcharge can be the rational choice. The tier maths decides, not the brochure, and the $450 a year of difference is real cash.
Mistake: Forgetting the add-backs in the income test.
Why it bites you: Reportable fringe benefits and reportable super contributions are added to taxable income for MLS purposes, which pushes pay-packaged earners up the tiers. Salary sacrifice does not dodge the surcharge - it can trigger it.
Mistake: Assuming extras cover avoids the surcharge.
Why it bites you: Only hospital cover counts; extras alone change nothing. Brent's dental cover did not stop the $2,475 surcharge at assessment.
Mistake: Budgeting for the surcharge as a payslip deduction.
Why it bites you: The surcharge is calculated on the tax return, not withheld through the year. The bill appears at assessment, which is why it surprises.
Mistake: Deferring the hospital cover decision past 30.
Why it bites you: The Lifetime Health Cover loading adds 2 percent per year over 30 to the premium, capping at 70 percent. The surcharge punishes this year; the loading punishes every year after.
I ran the surcharge against the policy premiums at five incomes - $105,000, $130,000, $160,000, $200,000 and Brent's $165,000 - so you don't have to. The surcharge lost at four of the five incomes and won at the bottom one, by roughly $450. That is the honest shape of the decision: the government's nudge is more expensive than the insurance above roughly $110,000 and cheaper below it.
What I appreciate about the surcharge is that it is honest about being a nudge. What I do not appreciate is the invoice style: the bill arrives in the assessment, months after the decision was made, and the add-backs push pay-packaged earners up a tier they did not know they were in. Brent's $2,475 arrived in the assessment with the loading clock already running. Run the tier maths before 30 June - the decision has a deadline whether or not the tax office sends a reminder.
It is an additional levy of 1, 1.25 or 1.5 percent of income, charged to taxpayers above the tier thresholds who do not hold private hospital cover. It applies on top of the standard 2 percent Medicare levy.
Singles pay nothing up to $101,000 of income for MLS purposes, then 1 percent to $118,000, 1.25 percent to $158,000 and 1.5 percent above. The family threshold starts at $202,000, plus $1,500 for each dependant child after the first.
Hospital cover does; extras alone do not. Without cover for part of the year, the surcharge applies pro rata for those days, and the premium is what the tier maths prices against it.
Above roughly $110,000 of income, the surcharge costs more than a basic policy and the cover wins. Below that line the surcharge can be the cheaper option - the tier maths decides, not the advertising.
No. Reportable super contributions are added back into income for MLS purposes, so sacrificing can push you up a tier. The surcharge is one of the tests the sacrifice does not dodge.
Disclaimer: This information is general in nature and does not constitute financial or legal advice. Always consult a qualified professional for your specific situation.

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.