Non-Concessional Contributions Cap Calculator Australia

What the non concessional cap calculator does

The non concessional cap is the ceiling on after-tax money going into super each year, and this calculator works out exactly how much of it you have available. It reads the annual cap, selects the bring-forward band your total super balance falls into, checks your age against the bring-forward age limit, subtracts anything you have already contributed, and prices the tax on any excess.

Getting this wrong is expensive in both directions. Contribute too much and the excess attracts a determination and possibly punitive tax. Contribute too little before a balance milestone and you permanently lose access to a much larger cap.

How the bring-forward multiplies the annual cap

The annual cap is set as a multiple of the concessional cap, so it moves whenever the concessional cap is indexed. Under it, a single year of after-tax contributions is straightforward.

The bring-forward rule is where the planning happens. Trigger it by contributing more than the annual cap in a year when you are eligible, and the next one or two years of cap collapse into the current one. Eligibility is decided by your total super balance on the 30 June before the year of contribution, measured against a set of bands:

• Below the lowest threshold, the full three-year bring-forward is available.
• In the next band, only two years.
• In the band immediately below the transfer balance cap, no bring-forward at all, just the ordinary annual cap.
• At or above the transfer balance cap, no non-concessional contributions are permitted.

Those band boundaries are rebased every time the transfer balance cap is indexed, which is why they are read from the parameter table rather than written into the code. The calculator reports the band it used and the room left before your balance drops into the next, smaller one.

Why the balance headroom figure matters

The headroom output is the difference between your current balance and the start of the next band. It is the single most actionable number in a large-balance contribution plan, because crossing a band boundary can cut the amount you may contribute by a hundred thousand dollars or more in one step.

Markets move balances without any action from you. Someone comfortably inside the three-year band in one June can be in the two-year band the next, purely on investment returns. If a large after-tax contribution is part of your plan, the timing relative to the 30 June measurement date is often worth more than the investment decision that sits behind it.

Age and the bring-forward

The bring-forward can only be triggered while you are under the relevant age at the right point in the year. Past that age the ordinary annual cap remains available while your balance is under the transfer balance cap, but no new bring-forward period can start.

Because that age limit has moved several times and is exactly the kind of figure that goes stale, the calculator takes it as an input rather than baking it in. Set it to the limit that applies in the year you are contributing and the result adjusts. Set it to zero to remove the age test entirely and see the pure balance-based answer.

Contributions already made

The advanced field for contributions already made this year matters more than people expect. Non-concessional contributions are not only the deliberate deposits you make. A spouse contribution received into your account, a personal contribution you decided not to claim a deduction for, and after-tax money transferred from a foreign fund all count towards the same cap.

If you are already inside a bring-forward period triggered in an earlier year, enter what has already been used against it. The remaining cap figure then reflects the room genuinely left, rather than restarting the count.

The cost of getting it wrong

If the excess stays in the fund it is taxed at the top marginal rate plus the Medicare levy, both read from the parameter table. That is the figure shown as tax on the excess if it stays in the fund, and it is deliberately unattractive.

The usual response to a determination is to withdraw the excess with its associated earnings. The earnings are then taxed at your marginal rate with an offset for the tax already paid in the fund, which is far better than the retained-excess outcome but still leaves you worse off than simply having contributed the right amount. Treat the excess figure as the cost of not checking.

Working it into a plan

Large after-tax contributions usually come from a specific event: a property sale, an inheritance, a redundancy payment or the maturity of a long-held investment. The cap is the constraint that decides how much of that money can be moved into the concessional environment and how many years it takes.

Where the amount exceeds the cap available, the common approach is to contribute the maximum this year and hold the rest outside super until a new period opens. Where a balance is close to a band boundary, bringing the contribution forward into the current year rather than deferring it can preserve a materially larger cap.

Downsizer contributions and small business capital gains tax cap amounts are separate from the non-concessional cap and are handled by their own tools. Do not count them here, or the answer will understate the room you have.

Limits of the estimate

The calculation assumes a single fund view, an accurate total super balance at the correct 30 June, and that any bring-forward already triggered has been entered in the advanced field. It does not check work test requirements, contribution acceptance rules that apply at older ages, or fund-level restrictions.

Every cap, band and rate used here comes from the current ATO parameters rather than being written into the code, so the figures move when the ATO revises them.

This is an estimate for planning purposes only, not tax or financial advice. Confirm your total super balance and your contribution room with your fund, the ATO or a licensed adviser before making a large contribution.

About This Tool: Non Concessional Cap

Non concessional cap: use this tool to get an instant, accurate estimate. The figures follow official ATO guidance and every rate and threshold is kept up to date for 2026. Adjust the inputs above to match your situation, or browse all our calculators to plan your next step.