FHSS Calculator: How Much Can You Really Save Through the First Home Super Saver Scheme?

The First Home Super Saver (FHSS) scheme promises thousands of dollars in tax savings for first-home buyers, but exactly how much can you expect to withdraw? An FHSS calculator takes your income, contribution amount, and savings timeline to produce a precise figure. This guide walks through the calculations step by step, so you can confidently plan your deposit strategy for FY 2025-26 without any guesswork.

How an FHSS Calculator Works

An FHSS calculator performs several calculations simultaneously. First, it determines how much of your contributions count toward the FHSS limits. Not all voluntary contributions qualify — only those made on or after 1 July 2017, and only up to $15,000 per financial year and $50,000 across all years. Employer compulsory contributions (the Super Guarantee) do not count.

The calculator then estimates the associated earnings on your contributions using the government's deemed rate. This rate is calculated as the 90-day Bank Bill rate plus 3%, and the ATO applies it to your contributions as if they were held in a separate account earning that rate. Understanding this deemed rate is crucial because it determines how much extra you can withdraw beyond your original contributions.

Finally, the calculator works out the withdrawal tax. When the ATO releases your FHSS amounts, they tax the assessable portion — which includes your concessional contributions and associated earnings — at your marginal tax rate minus a 30% tax offset. Non-concessional contributions are released tax-free. The calculator uses your estimated income to determine which marginal tax bracket you fall into.

FHSS Contribution Limits for FY 2025-26

The FHSS scheme has specific limits that directly affect your calculator output. Understanding these caps is essential before running any numbers, as they determine the maximum amount you can accumulate under the scheme. These limits apply per person, meaning couples can effectively double their FHSS savings.

Source: ATO.gov.au — First Home Super Saver Scheme. Limits current for FY 2025-26. Always verify current caps before making contributions.

Step-by-Step FHSS Calculation Examples

The best way to understand an FHSS calculator is to walk through real examples. Below are three common scenarios showing how different income levels and contribution strategies produce different outcomes. Each example assumes the saver contributes the maximum $15,000 per year for three years and withdraws after the third year.

Example 1: Moderate Income — $85,000 per Year

Sarah earns $85,000 per year and salary sacrifices $15,000 annually to her super for three years. Her marginal tax rate is 30% (the 16% bracket plus 2% Medicare levy, applied to income above $45,000; effectively the 30% bracket applies at this income level under Stage 3 cuts). She chooses concessional contributions because the gap between her marginal rate and the 15% super tax rate is significant.

Contribution phase: Each $15,000 is taxed at 15% inside super, costing $2,250 in contributions tax. Her super fund receives $12,750 net per year. Over three years, she contributes $45,000 total, with $6,750 in contributions tax paid. If Sarah had saved this money in a bank account after paying her marginal tax rate of 30%, she would have had only $10,050 per year after tax, totalling $30,150 over three years. The super structure saves her $2,250 per year in tax during the contribution phase.

Withdrawal phase: The ATO calculates deemed earnings on her contributions. Assuming a deemed rate of approximately 5.5% (3.25% 90-day Bank Bill rate + 3%), her associated earnings over three years would be roughly $3,500–$4,000. Her total assessable FHSS amount is $45,000 (concessional contributions) plus $3,750 (deemed earnings) = $48,750. The ATO applies her marginal rate of 30% minus the 30% offset, meaning effectively 2% tax (plus 2% Medicare levy, giving ~4% total). The tax on her withdrawal would be approximately $1,950. Her net FHSS withdrawal would be approximately $46,800 plus her $15,000 in non-concessional amounts (if any) — giving roughly $46,800–$50,000 to use for her deposit.

Example 2: Higher Income — $130,000 per Year

Michael earns $130,000 per year and also salary sacrifices $15,000 annually for three years. His marginal tax rate is 30% (the 30% bracket applies from $45,001 to $135,000 under Stage 3 cuts). With concessional contributions, the tax arbitrage is even more favourable. Each $15,000 contribution saves him $4,500 in tax compared to receiving it as salary (30% marginal rate + 2% Medicare levy = 32% vs 15% super tax = 17% saving, hence $15,000 × 17% = $2,550 saved per year).

Contribution phase: Over three years, Michael contributes $45,000. His super fund receives $38,250 after the 15% contributions tax. If he saved after-tax, he would have had approximately $30,600 over three years. The super approach saves him roughly $7,650 in tax over the three-year contribution period.

Withdrawal phase: With similar deemed earnings (~$3,750), Michael's assessable amount is $48,750. His marginal rate is 30%, so the effective withdrawal rate is approximately 2% + 2% Medicare = 4%. Withdrawal tax is roughly $1,950. His net FHSS proceeds would be approximately $46,800. Michael also benefits from checking his income tax position, as his salary sacrifice reduces his taxable income, potentially qualifying him for more government benefits or reducing his Medicare Levy obligations.

Example 3: Couple Combining FHSS — Both Earning $80,000

Emma and James each earn $80,000 and both contribute $15,000 per year for three years. Individually, each faces the same calculation as Sarah above. But combined, they can access up to $100,000 ($50,000 each) in contributions plus associated earnings. Their combined FHSS withdrawal, after tax, could be approximately $93,000–$100,000. That's a substantial contribution toward a typical deposit.

This example highlights why couples should consider the FHSS scheme seriously. The combined tax savings over three years total approximately $13,500 — money that would otherwise go to the ATO. Use our take-home pay calculator to see how salary sacrifice affects your net income under both scenarios.

Tax Comparison: FHSS vs. Regular Savings

The table below compares three savings strategies for a person earning $85,000 who saves $15,000 per year for three years. It clearly shows why the FHSS scheme is so attractive for first-home buyers.

Assumes $85,000 annual income, 30% marginal rate (16% + 14% above bracket), 2% Medicare levy, FY 2025-26 rates. Before-tax amounts. Actual results vary based on individual circumstances.

Factors That Affect Your FHSS Calculator Results

Not all FHSS calculations produce the same result. Several key variables affect the final withdrawal amount you can expect. Understanding these factors helps you plan more effectively and adjust your strategy if needed. The most important variables include your marginal tax rate, contribution type, timing, and deemed earnings rate.

Marginal tax rate: Higher-income earners benefit more from concessional contributions because the gap between their marginal rate and 15% is larger. Someone earning $180,000 saves $4,500 per $15,000 contribution compared to saving after-tax. Lower-income earners may prefer non-concessional contributions to avoid the withdrawal tax entirely.

Contribution type: Concessional (before-tax) contributions offer larger tax savings but incur withdrawal tax. Non-concessional (after-tax) contributions have smaller upfront tax benefits but are released tax-free. A balanced strategy using both types can optimise your outcome. Our salary sacrifice calculator helps compare these options.

Timing and duration: The longer your money stays in super, the more deemed earnings accumulate. However, the $50,000 total cap limits how long you can contribute. Most people reach the cap within three to four years if contributing the maximum $15,000 annually. The deemed rate also fluctuates with the 90-day Bank Bill rate, which affects your total withdrawal amount.

Other income factors: Your FHSS withdrawal may affect other tax calculations. For example, the released amount counts as assessable income, which could impact your HECS-HELP repayment obligations. Your superannuation balance also continues to grow outside the FHSS scheme.

Common FHSS Calculation Mistakes

Many first-home buyers make errors when calculating their FHSS benefits. One common mistake is assuming the full $50,000 will be available tax-free. In reality, concessional contributions and deemed earnings are taxed on withdrawal, reducing the net amount. The 30% tax offset helps significantly, but the effective rate is rarely zero.

Another frequent error is forgetting that the $15,000 annual FHSS limit applies per person and cannot be carried forward. If you contribute only $10,000 one year, you cannot contribute $20,000 the next year to make up the difference. The annual cap resets each financial year. Planning your contributions consistently across multiple years is essential to maximising your total.

Some calculators also underestimate the impact of the Super Guarantee rate increase to 12% in FY 2025-26. While employer SG contributions don't count toward FHSS limits, they do affect your total super balance and concessional contributions cap. Ensure your voluntary contributions plus employer SG remain within the $30,000 annual concessional cap to avoid excess contributions tax.

Frequently Asked Questions

Can I use the FHSS calculator if I have existing super contributions this year?

Yes, but you need to account for your existing contributions. The FHSS annual limit of $15,000 counts all voluntary contributions you make in a financial year, including salary sacrifice and personal deductible contributions. If you've already made $8,000 in voluntary contributions this year, you can only contribute another $7,000 toward FHSS this year. Your employer's compulsory SG contributions do not count toward the FHSS annual limit.

How does the FHSS deemed earnings rate work in practice?

The ATO calculates deemed earnings using the 90-day Bank Bill rate plus 3%, applied to your eligible contributions as if they were held in a separate account. The rate is updated quarterly. For FY 2025-26, with the Bank Bill rate around 3.25–3.5%, the deemed rate is approximately 5.5–6.5%. This rate applies regardless of your super fund's actual investment performance. Your FHSS calculator should use the current deemed rate for the most accurate estimate.

What happens if my income increases between contributing and withdrawing?

The ATO applies your marginal tax rate at the time of withdrawal, not at the time of contribution. If your income rises significantly before you withdraw your FHSS funds, you'll pay a higher effective tax rate on the assessable portion. This is an important consideration if you expect major income growth. You might consider front-loading non-concessional contributions in years when your income is lower to minimise future withdrawal tax.

Can I use FHSS funds to buy with a partner who already owns property?

Yes, but only the partner who has never owned property can use the FHSS scheme. If your partner has previously owned Australian property, they are ineligible. However, you can still use your individual FHSS entitlement toward a joint purchase. The property must be intended as your primary residence, and you must intend to live in it for at least six months within the first 12 months.

Is there a minimum amount I need to have saved before applying for FHSS release?

There is no minimum contribution or release amount under the FHSS scheme. You can apply for a release of any amount up to your total eligible contributions. However, given the administrative effort involved, most people find it worthwhile only when they have accumulated at least several thousand dollars. The ATO charges no fee for applying, but your super fund may have its own processes to follow.

Disclaimer: This article provides general information only and does not constitute financial or tax advice. FHSS rules, contribution caps, and tax rates may change. Always verify current information at ATO.gov.au and consult a licensed financial adviser or tax professional for advice specific to your circumstances.