Downsizing, CGT Discounts and Super: Smarter Moves With Investment Debt

If you’re in your 50s or 60s with a paid‑off or high‑equity home, a couple of investment properties and meaningful debt, the next move matters. Coordinating downsizing, capital gains tax (CGT) rules and super contributions with your investment loans can change whether you glide into retirement or feel squeezed for cash.

In plain terms: you want to (1) use the main residence CGT exemption and any investment property discounts sensibly, (2) decide how much of your sale proceeds should go into super versus debt, and (3) restructure remaining loans so your later‑life income is reliable and your risk is controlled.

This guide walks through that coordination step‑by‑step, with worked numbers you can map to your own situation this week.

1. The big picture: what you’re actually trying to optimise

For most Australian pre‑retirees who are “property‑heavy, cash‑light”, the real goal is not one perfect tax trick. It’s balancing four outcomes:

1. Secure housing – a home you actually want to live in for 10–20 years, with a manageable or zero mortgage.
2. Adequate retirement income – from super, investments and rent, after tax and after debt costs.
3. Resilient debt position – low enough gearing and solid buffers so rate rises or vacancies don’t derail you.
4. Sensible tax positioning – using CGT concessions and super rules without letting tax tail wag the dog.

If you haven’t already, it’s worth reading alongside:

• Downsizing To Clear Debt: How To Use Sale Proceeds Smartly
• Should You Keep More Debt On Properties With The Biggest CGT Bill?
• Beginner gearing rules: safe LVR caps, buffers and smart first buys
• Refinancing Underperforming Investment Properties: Hold, Renovate or Sell?

Taken together, you’re building an exit plan from gearing, not just reacting to a sale contract.

2. Key rules in play: CGT, super and loans (quick refresher)

2.1 CGT on the family home vs investments

Main residence exemption (ATO):

• Your principal home is generally CGT‑free for the period it’s your main residence.
• There are partial exemption rules if you:
  • Use it to produce income (e.g. Airbnb, home office, renting part out); or
  • Move out and rent it while treating it as your main residence under the 6‑year absence rule.

Investment properties:

• Held >12 months: usually eligible for 50% CGT discount for individuals and trusts.
• Your taxable gain = (Sale price – cost base – selling costs – capital improvements) × 50%.
• CGT is then added to your other income and taxed at your marginal rate.

Post‑2026 Budget changes tighten negative gearing and CGT concessions on some new purchases, but existing assets and earlier gains remain under current rules (subject to final legislation). Always check current ATO guidance.

2.2 Super contributions and downsizer rules

The coordination piece only works if you know your super contribution options:

1. Downsizer contribution (ATO rules as at 2026; subject to change):

• Available from age 55 (check current age threshold – it has moved before).
• Up to $300,000 per person (so $600,000 per couple) from selling your home.
• The property must have been your main residence and owned for at least 10 years.
• Contribution must be made within 90 days of receiving sale proceeds (settlement date).
• It doesn’t count towards your non‑concessional contributions cap.

2. Non‑concessional contributions (NCCs):

• Typically up to $110,000 per year, or up to $330,000 under the bring‑forward rule (assuming you’re under the age/total balance thresholds).
• Made from after‑tax money; no 15% contributions tax on the way in, but balances count toward your transfer balance cap when moved to pension phase.

3. Concessional contributions (CCs):

• Up to $27,500 per year including employer SG, salary sacrifice and personal deductible contributions.
• Taxed at 15% in the fund (or 30% for very high income earners under Division 293).
• Can be used strategically in a downsizing year to offset capital gains.

2.3 Your loans: deductible vs non‑deductible

On the lending side, you’re generally juggling:

• Non‑deductible home loan – debt on the place you live in; interest not deductible.
• Deductible investment loans – debt used to buy or improve income‑producing assets; interest generally deductible.

Prior knowledge from our CGT piece: for most households, eliminating non‑deductible home debt delivers a higher after‑tax benefit than keeping extra deductible investment debt until the home loan is relatively small (/insights/should-you-keep-debt-on-properties-with-highest-cgt-exposure).

That principle still matters when you’re downsizing – but now the twist is you’re also deciding how much to put in super, which compounds tax‑effectively and pays you income later.

3. Step 1 – Map your current position (30–60 minutes)

Before talking about exemptions and strategies, you need clean numbers.

3.1 Asset and loan snapshot

List each property and loan as it stands now.

Also note:

• Non‑property investments (shares, cash, business interests).
• Ages, work status, and rough retirement target age.

3.2 Cashflow and buffer snapshot

From the accumulated knowledge facts, a practical minimum buffer when you hold both home and investment loans is:

• 3 months of all repayments in cash or offset.
• Medium‑term target: 6 months of full holding costs (rates, insurance, strata, land tax). (See /insights/stress-testing-home-investment-loans-with-broker and /insights/upgrade-home-keep-old-as-investment-strategy.)

Check your:

• Current cash/offset.
• Monthly net rental income after interest and costs.
• Surplus or deficit after all household expenses.

You’ll use this to avoid a common error: putting too much into super or debt and ending up asset‑rich, cash‑poor.

4. Step 2 – Clarify your downsizing and sale decisions

4.1 Are you actually downsizing – or just relocating?

Downsizing in this context means:

• Selling your current home.
• Buying a cheaper home or moving to a lower‑cost area.
• Freeing up capital you can direct to debt reduction and/or super.

If you’re selling and buying at similar values, the “downsizer contribution” rules may still apply, but you won’t get a meaningful pool of surplus cash. The strategy focus shifts to:

• Debt structure.
• CGT on any investments you sell.
• How much to contribute to super from other funds.

4.2 Which properties will you sell, and in what order?

You have four broad levers:

1. Sell the current home and buy a cheaper one.
2. Sell one or more investment properties.
3. Keep all investments, just move home.
4. Stage sales over several years to manage CGT and risk.

The order matters for:

• Eligibility and timing for downsizer contributions (must come from the main residence sale).
• Managing CGT on investments (you can pick a lower‑gain property first or a higher‑gain one if it’s structurally poor).
• How much debt and rental income you carry into retirement.

Our restructuring guide on underperformers is relevant here: use objective numbers, not sentiment, to decide which investments to sell first (/insights/refinancing-underperforming-investment-properties-hold-renovate-or-sell).

5. Step 3 – Understand your CGT position before you sign anything

5.1 Main residence: fully exempt or partial?

Common scenarios:

1. Always your home, never rented, no business use → likely fully CGT‑free.
2. Rented out after moving but claimed as main residence under 6‑year rule → may still be fully exempt for that period.
3. Partially rented (room/flat) or used significantly for business → partial exemption, some CGT may apply.

Before you bank on putting all proceeds into super, get your tax adviser to model:

• Expected net sale proceeds after any CGT on the home (if applicable) and selling costs.
• Whether you can still use downsizer contributions if the home is partially exempt.

5.2 Investment properties: use the CGT discount wisely

A quick worked example.

• Investment unit bought for $600,000 in 2010.
• Cost base after stamp duty, legals and improvements: $650,000.
• Now selling for $1,100,000 with $25,000 selling costs.

Capital gain calculation:

• Gross gain = $1,100,000 – $650,000 – $25,000 = $425,000.
• 50% discount (held >12 months) → taxable gain = $212,500.
• If your marginal tax rate is 39% (including Medicare), extra tax ≈ $82,875.

This is where timing and super planning intersect:

• Can you realise this gain in a year when you’re working less, so your marginal rate is lower?
• Can you make concessional contributions to offset some of this tax?