Superannuation: Salary Sacrifice vs After-Tax Contributions 2026

Australians who add extra money to super are among the biggest winners in the tax system. But choosing between salary sacrifice (concessional) and after-tax contributions (non-concessional) changes your outcome by thousands of dollars per year. This guide runs the 2026 numbers, including the new $30,000 concessional cap and $120,000 non-concessional cap.

The Two Ways to Grow Your Super Beyond Employer SG

1. Concessional Contributions (Salary Sacrifice)

Money goes in BEFORE income tax. The super fund pays a flat 15 percent contributions tax (30 percent if your income exceeds $250,000 under Division 293).

• 2026 cap: $30,000 per year (includes employer SG of 12 percent)
• Unused cap can be carried forward 5 years if your super balance is under $500,000
• Counts employer SG, salary sacrifice, and personal deductible contributions

2. Non-Concessional Contributions (After-Tax)

Money goes in AFTER income tax. No contributions tax in the fund.

• 2026 cap: $120,000 per year
• Bring-forward rule: under 75, you can contribute up to $360,000 in one year (3-year average)
• Not allowed if your total super balance is at or above $1.9 million

The Core Tax Math

Concessional contributions swap your marginal tax rate for 15 percent. The tax saving equals your marginal rate minus 15 percent. 2026 individual tax rates:

• $0-$18,200: 0 percent (no benefit from salary sacrifice)
• $18,201-$45,000: 16 percent (benefit is marginal - only 1 percent saving)
• $45,001-$135,000: 30 percent (15 percent saving)
• $135,001-$190,000: 37 percent (22 percent saving)
• $190,001+: 45 percent (30 percent saving, but Div 293 cuts it to 15 percent over $250K)

Worked Example: $100,000 Salary, $10,000 Extra into Super

Option A: Salary Sacrifice $10,000

• Marginal tax avoided: $10,000 x 30 percent = $3,000
• Plus 2 percent Medicare levy: $200
• Contributions tax on entering super: -$1,500
• Net tax saving: $1,700 per year
• Amount that lands in super: $8,500

Option B: Non-Concessional $10,000 (after tax)

• You pay $10,000 from take-home. That required $14,500 gross income (at 30 percent + 2 percent Medicare)
• No contributions tax
• Amount that lands in super: $10,000
• Net tax saving: $0 in the contribution year

Gap Analysis

Salary sacrifice puts $8,500 into super for a $7,000 net cost ($10,000 gross - $3,000 tax saved). That is a 21 percent instant return before the market even moves. Non-concessional puts $10,000 in but costs the full $10,000 of take-home. Model your exact numbers in our Superannuation Calculator Australia.

30-Year Compounding: Why This Matters

An extra $8,500/year into super at 7 percent real returns for 30 years becomes ~$802,000. The tax saving ($1,700 x 30 = $51,000) alone, if invested at 7 percent, grows to $161,000. Over a working life, disciplined salary sacrifice can add $500K-$1M to retirement.

When Non-Concessional Actually Wins

1. You have already hit the $30,000 concessional cap. Employer SG at 12 percent on a $250K salary is already $30K.
2. One-off windfall. Inheritance, house sale, redundancy. Use bring-forward rule to inject $360K in one go.
3. Low marginal tax year. On parental leave or a career break, your marginal rate is 16-18 percent - salary sacrifice loses appeal.
4. Eligible for government co-contribution. Earn under $45,400 and contribute $1,000 non-concessional - the government adds up to $500.
5. Spouse contribution tax offset. Contribute to a low-income spouse's super, claim up to $540 tax offset.

The Carry-Forward Rule - Underused

If your total super balance was under $500,000 on 30 June last year, you can use unused concessional cap from the previous 5 years. Example: $15,000 unused cap each year for 5 years means you can contribute $30,000 + $75,000 = $105,000 concessional this year. Perfect for a high-income year (bonus, capital gain) when you want maximum tax offset.

Division 293 Tax: High-Income Trap

If your combined income plus concessional contributions exceeds $250,000, an EXTRA 15 percent tax applies to the concessional contributions above the threshold. Effective tax becomes 30 percent in super - same as non-concessional after-tax. At this level, non-concessional or investing outside super both become competitive.

The 3-Step Decision Framework

1. Earn over $45,000? Max salary sacrifice first up to the $30,000 cap (minus employer SG).
2. Still have cash left? Non-concessional up to $120,000 if under the $1.9M total super balance cap.
3. Low-income spouse? Spouse contribution for the $540 offset.

Watch Your Salary Packaging

Salary sacrifice is documented via a formal agreement with your employer BEFORE the pay period begins. Retrospective sacrifice is not allowed. Also check if your employer calculates SG on pre-sacrifice or post-sacrifice salary - by law it must be pre-sacrifice since 2020, but some payroll systems still get this wrong. Verify your payslip and compare against our salary calculators for take-home impact planning.

Accessing Your Super: The Preservation Age Trap

Even after you retire, you cannot touch super until your preservation age (60 for anyone born on or after 1 July 1964). Between preservation age and 65, access requires retirement or a transition-to-retirement (TTR) income stream. Post-65 no retirement test applies. Pension-phase super earnings are tax-free up to the $1.9 million transfer balance cap - one of the most generous tax environments available anywhere.

Compare to Investing Outside Super

A common question: would I be better off in a brokerage account? Quick math: $10,000 invested outside super at 30 percent marginal rate leaves $7,000 to invest. Earnings taxed annually at 30 percent means an effective ~4.9 percent after-tax return if the gross was 7 percent. Inside super, $10,000 pre-tax becomes $8,500 after contributions tax, then grows at 6 percent after-tax (15 percent tax on earnings). Over 20 years, $8,500 at 6 percent becomes $27,250; $7,000 at 4.9 percent becomes $18,080. Super wins by 51 percent.

Special Cases Worth Knowing

• Low Income Super Tax Offset (LISTO): If you earn under $37,000 and have any concessional contributions, the government refunds up to $500 back into your super.
• First Home Super Saver Scheme: Salary sacrifice up to $15,000/year (max $50,000 total) can be withdrawn for a first home deposit, taxed at marginal rate minus 30 percent offset.
• Downsizer contribution: Sold your home after age 55? Put up to $300,000 each ($600,000 per couple) into super outside the usual caps.
• Spouse contributions: Contribute to a spouse earning under $40,000. First $3,000 gets you an 18 percent tax offset (up to $540).

For a full tax-return view including super contributions, use our Australian Tax Return Calculator.