The arithmetic behind One Nation’s superannuation redirection proposal is straightforward: take 3 percentage points of the compulsory 12% super contribution, redirect it to your pay packet for up to three years, and the extra cashflow could materially change your debt position. What the figures don’t tell you is which households win from this trade and which ones end up poorer.
Canstar’s modelling shows a worker on median earnings with a $600,000 mortgage at 6% interest would get roughly $200 a month extra if they diverted that 3%. Funnelled straight into loan repayments over three years, that wipes $31,279 in interest and shaves 10 months off the loan term. The same worker’s super balance at age 67 ends up around $47,986 lower in nominal dollars, compound growth forgone, not just the contributions themselves.
The policy lets workers redirect a quarter of their super for a fixed three-year window. It’s pitched as relief for households buried under mortgage serviceability pressure or rental stress. The mechanics are simple: your employer pays you the 3% instead of sending it to your fund. You decide where it goes.
The interest relief is real, the retirement hit is delayed
For a borrower paying down a typical home loan, an extra $2,400 a year ($200 monthly) over 36 months compounds rapidly. Mortgage interest accrues daily, so every additional repayment cuts the principal faster and reduces the interest charged on future cycles. The $31k saving Canstar calculated is total interest avoided over the life of the loan, not just during the three-year window.
The super opportunity cost works differently. The $47,986 retirement shortfall includes both the contributions not made and the investment returns those contributions would have earned over 30 years. Canstar’s figure assumes a standard long-term super fund return, historically around 7-8% annually after fees. If markets underperform or the worker’s fund is high-fee, the actual gap narrows. If markets outperform, it widens.
The catch
- A 37-year-old using this option sacrifices roughly $13,500 in direct contributions plus decades of compounding, that’s where the $48k gap comes from
- The interest saving assumes the extra cash goes straight to the loan; if it leaks into consumption, the debt benefit disappears
- Three years is the policy cap, but once the window closes, super contributions revert to 12%, no catch-up mechanism
- The retirement gap compounds if the same worker also accessed super early during COVID or under other schemes
Who this trade favours and who it doesn’t
The proposal works best for borrowers who are mortgage-constrained but employment-secure. If your serviceability buffer is tight and an extra $200 a month keeps you out of arrears or lets you avoid selling at the wrong time, the interest saving is immediate and material. For renters without a mortgage, the policy offers cash relief but no compounding debt benefit, the super forgone is a straight loss unless the extra income funds a deposit faster.
Younger workers (under 35) pay the steepest retirement price. The compounding runway is longer, so the same $13,500 in missed contributions grows into a much larger gap by age 67. A 25-year-old using the full three-year window could see the retirement shortfall exceed $70,000 in future dollars. For a 50-year-old closer to retirement, the compounding window is shorter and the mortgage paydown benefit is proportionally larger.
Investors with multiple properties or high incomes gain less. The 3% redirection is a flat percentage of salary, so higher earners get more absolute dollars, but they’re also more likely to have surplus cashflow already. The policy isn’t means-tested, so a household earning $200,000 can access it as easily as one earning $70,000.
The housing market friction no one’s modelling
Canstar’s warning about demand-side inflation isn’t hypothetical. When first homebuyer grants and COVID-era super withdrawals put extra cash in buyers’ hands, auction clearance rates and median prices both lifted, not because supply increased, but because more bidders had larger deposits. If enough workers redirect super into housing at the same time, the same dynamic plays out: prices adjust upward to absorb the new liquidity, and the policy becomes a transfer from future retirees to current sellers.
The proposal doesn’t address supply constraints, zoning bottlenecks, or construction costs. It shifts cashflow timing for individual households, but the aggregate effect depends on how many people use it and whether they cluster in the same markets. If take-up is concentrated among first homebuyers in high-demand suburbs, the inflationary pressure is localised and sharp. If it’s spread across upgraders and refinancers, the impact dilutes.
Scenarios: when the maths flips
Base case: borrower diverts 3% for three years, pays down the mortgage faster, retires with a smaller super balance but a fully owned home. The trade works if the interest saved exceeds the opportunity cost of forgone super returns, roughly true when mortgage rates sit above long-term super fund returns.
Upside: mortgage rates stay elevated (6%+) while super funds deliver lower returns (5-6%) due to market volatility or fees. The interest saving widens, the retirement gap narrows, and the trade becomes more attractive.
Downside: mortgage rates fall to 4-5% while super funds deliver strong returns (8-9%). The interest saving shrinks, the retirement gap balloons, and the worker would have been better off leaving the 3% in super. This scenario is more likely for younger workers with decades of compounding ahead.
First home buyer scheme hits 250,000: but did it add supply or displace it? covers similar demand-side dynamics, what happens when policy injects liquidity without fixing supply.
Red flags for implementation
The policy requires employer payroll system changes to redirect contributions mid-year. Small businesses and sole traders may face compliance friction or delays. There’s no detail yet on whether the redirection applies to salary sacrifice contributions (voluntary) or just the compulsory 12%, which could create loopholes or unintended gaps.
If super funds lose 3% of inflows for three years across a large cohort, fund-level liquidity tightens and fee pressure builds on remaining members. Funds with illiquid assets (infrastructure, private equity) may need to rebalance portfolios to meet withdrawal demand, which could drag returns.
The age pension means test treats super and home equity differently. A retiree with a $1.5 million home and low super may qualify for more pension than one with $500,000 in super and a smaller home. If the policy shifts wealth from super to housing, the fiscal cost of the age pension rises, a trade-off the proposal doesn’t acknowledge.
What this means for your decision
If you’re serviceability-constrained, mortgage rates are high, and you’re within 10-15 years of paying off the loan, the interest saving likely outweighs the super forgone. Run the numbers with your actual loan size, rate, and remaining term, Canstar’s $31k figure is illustrative, not universal.
If you’re under 35, renting, or planning to buy in three-plus years, the retirement gap compounds faster than the immediate cash benefit. The policy might still make sense if the extra income lets you save a deposit faster, but only if you’re disciplined about quarantining the funds, don’t let it leak into consumption.
If mortgage rates fall below 5% or your super fund consistently beats 7% returns, the arithmetic flips. The policy locks you into a three-year window, you can’t reverse it if conditions change mid-stream.
Subscribe to the newsletter for weekly updates when housing policy, super rules, or mortgage settings shift.
General info, not financial advice.
