Super vs Offset vs ETFs: Where Should Your Extra Money Go in 2026?

Most Australian homeowners with a surplus each month face the same three-way decision: add to super, stack the offset account, or buy ETFs. Each vehicle is legitimate. Each wins in different circumstances. The mistake is treating this as a binary choice when the right answer is usually a sequence.

This article gives you the comparison framework, explains when each option wins, and lays out the order that works for most people in their 30s and 40s.

How the three options compare

Each vehicle has a different tax treatment, risk profile, and accessibility. Here is the side-by-side:

	Superannuation	Offset account	ETFs (outside super)
Expected return	7–10% (growth fund, not guaranteed)	= your mortgage rate (guaranteed)	8–10% historical (not guaranteed)
Tax on contributions	15% (concessional)	None	None (after-tax dollars)
Tax on earnings	15% on fund income	None (reduces non-deductible interest)	Marginal rate on dividends; CGT on gains
CGT on gains	33.3% discount in accumulation phase	N/A	50% discount (held 12+ months) — but only 30% minimum tax from July 2027*
Accessibility	Locked until age 60 (preservation age)	Fully accessible, any time	Accessible, T+2 settlement
Government rule risk	Moderate — rules have changed before	Low	Low
Risk of loss	Market risk — can fall 20–40% short term	None	Market risk

*CGT changes effective 1 July 2027 remove the 50% discount for individuals and replace it with a 30% minimum tax. See our CGT changes explained article.

Key takeaway from the table: Super has the best tax treatment on earnings (15% flat) and the highest expected return — but you cannot access it for decades. The offset is the safest and most flexible but caps out at your mortgage rate. ETFs sit in between: higher expected returns than the offset, accessible, but taxed at your marginal rate and subject to the upcoming CGT changes.

When each option wins

Super wins when:

• You are on a 30%+ marginal tax rate — the 15% tax saving on contributions is an immediate, guaranteed uplift before your fund earns a cent
• You have a long time until 60 (20+ years) and do not need the money before then
• Your super fund consistently returns more than your mortgage rate after the 15% earnings tax (industry growth funds have averaged ~8–9% net over the past decade)
• After the July 2027 CGT changes, super also wins over outside-super ETFs on any investment with large embedded capital gains — the 33.3% discount inside super now beats the 30% minimum tax outside

The offset wins when:

• You do not have an emergency fund yet — offset money is accessible the same day, at zero risk
• You are on a low marginal tax rate (below 30%) and the super tax saving is minimal
• Your mortgage rate is high (6%+) and you value a guaranteed, risk-free return
• You may need capital before you turn 60 — redundancy, career change, property purchase, helping adult children
• You are within 5–10 years of paying off the mortgage and want to eliminate the debt entirely

ETFs win when:

• You have maxed your concessional super cap ($32,500/year in 2026-27) and want more wealth outside super
• You want to retire before 60 — outside-super investments are the only bridge between early retirement and super preservation age (see our FIRE bridge fund guide)
• You want flexibility that super does not provide and liquidity that the mortgage equity does not provide
• You are comfortable with short-term volatility and have at least a 7–10 year horizon

Use our Superannuation Calculator to project your super balance and see whether you are on track before redirecting extra cash elsewhere.

The recommended order for most people

This is not a universal rule — individual circumstances vary — but the following sequence works for the majority of Australian homeowners in their 30s and 40s:

Step 1 — Emergency fund (3–6 months of expenses in the offset)

Before optimising for returns, optimise for resilience. Three to six months of living expenses in an offset account means a job loss, medical bill, or car repair does not force you to sell investments at a bad time or miss mortgage repayments. This comes first, always.

Step 2 — Employer super + salary sacrifice to capture the concessional cap

If you earn above $45,000, the tax saving on concessional super contributions (17–32% on every dollar, depending on your bracket) is too valuable to leave on the table. Your employer's 12% SGC counts toward the $32,500 cap. Once you know how much cap remains, salary sacrifice to fill it.

For example, at $110,000 salary: employer SGC = $13,200, leaving $19,300 of cap. Sacrificing $19,300 at a 32% marginal rate saves $3,283 in tax that year.

Not everyone can sacrifice the full remaining cap — cash flow is real. Even a partial sacrifice ($5,000–$10,000/year extra) captures most of the tax benefit.

Step 3 — Remainder into offset

After the emergency buffer and the super cap, any remaining surplus goes into the offset. This earns your mortgage rate — currently around 6.0% — risk-free and accessible. It is a better guaranteed return than a term deposit and requires no investment decisions.

Step 4 — Non-concessional super or ETFs (once offset is comfortable)

Once the offset is large enough to cover the mortgage down to a level you are comfortable with, you can redirect surplus to either non-concessional super contributions (up to $130,000/year or $390,000 bring-forward over three years) or outside-super ETFs.

Which of these two — non-concessional super or ETFs — depends on your timeline to 60, your expected tax rate in retirement, and whether you want the money accessible before then.

Worked example: $1,500/month surplus

Household: Emily and James, both 37. Combined income $180,000. Mortgage $620,000 at 6.0%. Monthly surplus after all expenses and minimum mortgage repayments: $1,500.

Their employer SGC is already being paid. Emily has $8,000 of concessional cap remaining; James has $11,000.

Month 1–6: Build emergency fund They direct all $1,500/month into the offset. After six months: $9,000. Their combined monthly living expenses are approximately $6,500, giving them 1.4 months of cover. They keep going until $26,000 (four months of cover).

Month 7–24: Fill concessional cap via salary sacrifice Emily salary sacrifices $667/month ($8,000/year); James sacrifices $917/month ($11,000/year). Combined: $1,584/month. This slightly exceeds their surplus, so they reduce other discretionary spending slightly and direct the remainder into offset.

Year 3+: Offset building Once their concessional caps are fully utilised, they direct $1,500/month into offset. At 6.0% interest, every $1,500 added to the offset saves $90/month in interest — and that saving compounds as the offset grows.

The result: Tax savings of approximately $4,500/year from the salary sacrifice. Super growing faster due to larger balances. Offset building a genuine liquidity cushion. No ETF purchases yet — and that is fine for their stage.

The post-2027 CGT shift changes the ETF calculation

From 1 July 2027, the 50% CGT discount for individuals on investments held more than 12 months is replaced by a 30% minimum tax. This makes outside-super ETFs meaningfully less tax-efficient for higher earners.

Before 2027: $100,000 capital gain held 12+ months, 37% MTR → taxable gain $50,000 × 37% = $18,500 tax. From 2027: same gain → minimum 30% flat → $30,000 tax.

Inside super in accumulation phase, the fund still gets a 33.3% CGT discount (not the 50% discount), so the tax inside super is: $66,667 × 15% = $10,000. Super wins by $20,000 on this gain alone.

This does not mean ETFs are bad — they remain excellent for flexibility and pre-60 access. But it does mean that for long-term money you will not need before 60, super is now even more clearly the better vehicle.

For the full detail on this shift, see Super vs Outside Super After the 2027 CGT Changes.

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Frequently asked questions

Should I max my super or pay off my mortgage first?

For most people earning above $45,000, salary sacrificing into super to fill the concessional cap is worth doing before aggressively paying down the mortgage — because the tax saving on super contributions is an immediate benefit that the mortgage cannot match. However, keeping a solid offset account buffer matters too, because super is inaccessible until age 60. See our salary sacrifice super vs mortgage guide for the full comparison.

Is an offset account better than a savings account?

Almost always yes if you have a mortgage. An offset account reduces the interest charged on your loan at your full mortgage rate (currently around 6.0%), which is typically higher than any savings account rate and the return is not taxable. A savings account earns taxable interest at whatever rate the bank offers. The only reason to choose a savings account over an offset is if your lender charges a fee for an offset account that outweighs the benefit.

Can I have ETFs inside super instead of outside?

Yes. Many industry and retail super funds offer direct investment options including ASX-listed ETFs. Some wrap platforms and all SMSFs allow this too. Holding ETFs inside super means earnings are taxed at 15% instead of your marginal rate, and capital gains get the 33.3% discount inside super. The trade-off is that the money is locked until preservation age. For most people, low-fee diversified super fund investment options (like balanced or high-growth) are simpler and have similar returns.

What is the concessional super cap for 2026-27?

The concessional contributions cap is $32,500/year from 1 July 2026, up from $30,000 in 2025-26. This includes your employer's Superannuation Guarantee (12% from 1 July 2025), any salary sacrifice contributions, and any personal deductible contributions. For full details including carry-forward rules, see our super contribution caps guide.

How much should I keep in the offset vs investing?

A common rule of thumb: keep three to six months of total living expenses (including mortgage repayments) in your offset at all times as a buffer. Beyond that, the question is whether your mortgage rate is low enough that investing in super or ETFs is clearly better. At 6.0%+ mortgage rates, the risk-free offset return is competitive with after-tax ETF returns, so there is no rush to invest once you have filled the concessional super cap.

Does the offset account count toward my super balance?

No. The offset account is a bank account linked to your home loan — it reduces your mortgage interest but has no relationship to superannuation. Your super balance is held inside your super fund and is counted separately for all purposes including Division 293 ($250,000 income threshold) and transfer balance cap calculations.

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This article is for general information only and does not constitute financial, tax or legal advice. Individual circumstances vary. Consult a registered tax agent or licensed financial adviser before making decisions based on this information.