Catch-Up Super Contributions: How to Use Unused Caps to Save Thousands

Most freelancers don't max out their $30,000 super contribution cap every year. Plenty contribute nothing at all. What they don't realise is that unused cap space doesn't just disappear. It rolls forward for up to five years under the carry-forward rule, and it can save you thousands in tax when you're ready to use it.

New to voluntary super contributions? Start there first. This article builds on those basics.

How carry-forward contributions work

Since the 2018-19 financial year, the ATO has allowed you to carry forward unused portions of your concessional contribution cap from previous years. If you didn't use your full cap in a given year, the unused amount rolls forward for up to five financial years.

There are two eligibility requirements:

1. Your total super balance must be below $500,000 as at 30 June of the previous financial year
2. You have unused cap amounts from the previous five years (anything older than five years expires)

That's it. No special application, no ATO approval needed. You just contribute above the standard $30,000 cap using your accumulated unused amounts.

Checking your unused cap space

You can check exactly how much carry-forward space you have:

1. Log into myGov and go to the ATO section
2. Go to Super > Information > Carry-forward concessional contributions
3. You'll see your unused cap from each of the previous five financial years and your total available balance

The ATO calculates this automatically based on your contribution history and the caps that applied in each year.

For reference, here are the concessional caps from recent years:

If you contributed nothing in any of those years, you could have up to $142,500 in available cap space ($27,500 × 3 + $30,000 × 2). Though realistically, most freelancers have at least some employer contributions from past PAYG roles that eat into earlier years.

Worked example: Sarah catches up after three lean years

Sarah has been freelancing for four years. For the first three, she was focused on building her client base and didn't contribute anything to super. This year, business is strong, and she's earning $160,000.

Her situation:

• Super balance: $85,000 (under the $500,000 threshold ✓)
• Unused caps from previous 3 years: $27,500 + $27,500 + $30,000 = $85,000
• Current year cap: $30,000
• Total available space: $115,000

Sarah doesn't need to use all of it. She decides to contribute $50,000 this year: the standard $30,000 cap plus $20,000 from her carry-forward balance.

Tax savings:

At $160,000 income, her marginal rate is 37% plus 2% Medicare Levy = 39%.

The first $25,000 of her contribution comes off the top bracket (above $135,000):

• $25,000 × 39% = $9,750 in tax she would have paid

The next $25,000 comes off the 30% bracket:

• $25,000 × 32% = $8,000 in tax she would have paid

Total tax avoided on that $50,000: $17,750

Contributions tax inside super: $50,000 × 15% = $7,500

Net tax saving: $10,250

That's over ten thousand dollars in tax savings.

Sarah adds $42,500 to her super balance (after the 15% contributions tax) and her taxable income drops from $160,000 to $110,000.

When catch-up contributions make sense

Carry-forward contributions work best when:

You had a standout year

Freelance income fluctuates. If you've had an unusually strong year (landed a big project, got a bonus, or had consistently high billing), catch-up contributions let you shelter more of that income at 15% instead of 37% or 45%.

You've only recently started contributing

Many freelancers only discover the super tax benefit after a few years. The carry-forward rule means those early years of zero contributions aren't wasted. You can backfill the gap.

You're approaching a higher tax bracket

If your income is pushing into the 37% bracket (above $135,000) or the 45% bracket (above $190,000), catch-up contributions give you a larger bucket to pull income into the 15% super tax rate. The wider the gap between your marginal rate and 15%, the more you save.

Note: if a large catch-up contribution pushes your combined income and contributions above $250,000, you'll hit Division 293 tax. It's still worth contributing in most cases, but run the numbers first.

You received a lump sum

Sold an asset? Received a large project payment? Catch-up contributions can absorb a bigger chunk of that lump sum income than the standard $30,000 cap would allow.

When it doesn't make sense

Catch-up contributions aren't always the right move:

• Your income is below $45,000: the tax saving per dollar is much smaller (18% marginal vs 15% in super = only 3 cents per dollar)
• You have high-interest debt. Paying off a credit card at 20% interest gives a guaranteed 20% return. Super returns are uncertain and locked away until preservation age
• You need the cash for business investment. If reinvesting in your business would generate a higher return than the tax saving, keep the money working
• Your super balance is above $500,000, so you're not eligible for carry-forward. You can still contribute up to the standard $30,000 cap

Step by step: making a catch-up contribution

The process is the same as a regular voluntary contribution, but with larger amounts:

The Notice of Intent is non-negotiable

This applies to regular contributions too, but it's worth emphasising for catch-up amounts because the stakes are higher. If you contribute $50,000 and forget to submit the Notice of Intent, you lose the entire tax deduction on the full amount. That could mean missing out on $10,000+ in tax savings.

Submit the notice as soon as the contribution hits your super account. Don't wait until tax time.

Frequently asked questions

Can I use carry-forward contributions from before I was a freelancer?

Yes. The rule looks at your total concessional contributions each year, regardless of employment status. If your old employer only contributed $15,000 in a year when the cap was $27,500, you have $12,500 of unused space from that year. Those years as an employee with a stingy super contribution are working in your favour now.

Do I need to use the oldest unused amounts first?

Yes, it's first-in, first-out. Oldest unused cap gets used first. This matters because unused amounts expire after five years.

Can I spread catch-up contributions across the year?

Yes. The cap applies to the total for the financial year, not to individual contributions. Monthly, quarterly, lump sum - whatever suits your cash flow.

What if I also have employer super contributions this year?

Employer Super Guarantee contributions count toward your concessional cap. If you earn $80,000 from a part-time job and your employer contributes 12% ($9,600), that $9,600 reduces the space available for your personal deductible contributions. Factor this in when calculating how much to contribute.

How do I know my super balance is under $500,000?

Check your super fund's website or app for your balance as at 30 June of the previous financial year. If you have multiple super accounts, add them together. The ATO also shows your total super balance on myGov under Super > Information > Accounts and transactions.