PPOR-first conversion vs Direct investment — how should you buy?

Rates and links verified as at 2026-05-17. Tax rules change; verify with official sources before acting on any output.

The strategic question

• The post-2027 reform abolished traditional negative gearing for established residential — losses now go to a quarantine pool, only offsettable against future residential rental income OR a future residential capital gain. This eliminates a long-standing tax shield for direct-investment buyers.
• The PPOR-first conversion strategy preserves a different tax shield: the s118-145 6-year absence rule + s118-192 cost-base reset together can eliminate CGT entirely on a sale within 6 years of conversion. This is now the only way to get tax-friendly leverage on established residential.
• But Strategy A has costs: you forgo rental income during the live-in period, you pay rent elsewhere only during the rental period (vs the whole hold under B), and the loss pool you accumulate during rental is stranded if you sell MRE-exempt (no gain to offset against). The calc surfaces all these.
• The right strategy depends on your inputs. Strategy A wins when: high capital growth, sale within 6 years of conversion, long live-in period giving a bigger cost-base reset, AU resident at sale. Strategy B wins when: low growth, long hold past the 6-year cliff, you'd lose the MRE anyway (non-resident at sale), or you can't physically commit to living in the property as PPOR.

The 6-year absence rule (ITAA 1997 s118-145) — Strategy A only

• The core mechanic. When you move out of your main residence, you can keep treating it as your PPOR for CGT purposes — preserving the main residence exemption (MRE) — up to 6 years per absence period while it produces rental income, OR indefinitely if it produces no assessable income (left vacant, family rent-free).
• Per absence, not cumulative. Move out for 4 years, move back in for ≥6 months (practitioner-safe re-occupation threshold), then move out again — and a fresh 6-year window opens. ATO has no statutory minimum re-occupation duration, but practitioner consensus is that anything under 3 months is high-risk for a challenge; 6+ months is safe. ATO — Treating former home as main residence.
• Only one PPOR at a time (s118-145(4)). If you claim another property as your main residence during the absence, you can't also use the s118-145 election. You have to nominate.
• Partial CGT past the 6-year cliff (s118-185). If you exceed 6 years renting, the gain is apportioned: taxable gain = total gain × (non-MRE days / total ownership days). An 8-year absence with rent = 2 years of taxable gain.

The s118-192 cost-base reset — a hidden win

• Mandatory, not optional. When your home first produces income (the first day it's available for rent), the CGT cost base resets to market value at that moment — wiping out the pre-rental capital gain from future CGT. This is automatic under the law whenever the property would have been fully MRE-exempt immediately before the income-time. You can't choose to apply it later or skip it.
• Why it matters. If you bought for $1M and at conversion the property is worth $1.5M, then rent for 8 years (going past the 6-year cliff), the s118-185 apportionment is applied to the $500k post-reset gain, not the full lifetime gain. The earlier you start the rental period (and the more growth you've captured as PPOR), the bigger the shield.

s118-192 — what you actually have to do (practical steps)

• Step 1 — Document the exact "income time" date. This is the day the property is first available for rent (i.e., listed with an agent or directly advertised), not necessarily the day the first tenant moves in. Pin it down with: the agent's marketing-start date, listing screenshots, the property-management agreement signing date. Get a paper trail.
• Step 2 — Obtain a market valuation at that date. You need DEFENSIBLE evidence of market value as at the income time. Three options in order of strength:
  • Sworn valuation by a Certified Practising Valuer (CPV) — typically $400-1,000. Strongest defence if the ATO ever queries the cost base. Recommended whenever the implied gain is >$100k (i.e., the difference between original purchase price and current value at conversion). Most accountants insist on this for material gains.
  • Written real estate agent appraisal letter — free. Acceptable for smaller gains; weaker if challenged. Ask 2-3 agents for written appraisals as at the move-out date and keep all letters.
  • Bank desktop valuation / online estimate — free but weakest evidence. ATO is more likely to challenge.
• Step 3 — Get it AT the time, not retrospectively. A valuation dated 5 years after the income time, trying to reconstruct what the property was worth back then, is much weaker evidence than one issued contemporaneously. If you forget at the time, the ATO may accept a retrospective valuation but will scrutinise more carefully.
• Step 4 — Add capital improvements made BEFORE conversion to the cost base separately. Major renovations, extensions, structural upgrades — if you did them while living in the property, they form part of the reset cost base via the market valuation (the valuation captures their impact on value). Improvements DURING the rental period are added via the standard cost-base rules (s110-25(5)).
• Step 5 — Keep records for 5+ years past the eventual sale. The ATO can audit a CGT event for the period running from the year of sale + 5 years (or longer if fraud suspected). Store: valuation report, agent letters, listing evidence, photos, property-management agreement. A separate "PPOR conversion" folder is the practitioner-standard practice.
• Step 6 — Apply the reset on your tax return when you eventually sell. Your tax agent will use the market value at conversion (not the original purchase price) as the cost base. This is calculated automatically in the tax software if they enter the right inputs — but check the return.
• Sources: ITAA 1997 s118-192; ATO — Using your home to produce income; ATO Taxation Determination TD 92/130 on valuation by qualified valuers.

The non-resident-at-sale cliff (2019/2020 reform)

• All-or-nothing denial. If you're a foreign tax resident at the contract date of disposal, the main residence exemption is fully denied — including s118-145 absence treatment. The whole gain back to acquisition (or s118-192 reset date) is taxable. No apportionment.
• Grandfathering expired. Only applied to properties owned at 9 May 2017 AND sold by 30 June 2020. Not relevant for anyone buying in 2026+.
• Life events exception (s118-110(5)). Available only if you've been non-resident for a continuous ≤6 years AND a specific event occurred during that period: terminal medical condition (you/spouse/child), death of spouse or child under 18, OR formal property settlement on marriage/relationship breakdown.
• Return to AU resets eligibility. The denial triggers at the CGT-event date. If you become AU resident again before signing the sale contract, you reclaim the full MRE — including for the prior overseas period.
• Sources: ATO — Main residence exemption for foreign residents; Treasury Laws Amendment (Reducing Pressure on Housing Affordability Measures) Act 2019.

Interaction with the post-2027 reform (the strategic angle)

• MRE survives intact. The family home stays 100% exempt. s118-145 absence treatment is untouched by the 2026 Budget package.
• Loss quarantine still applies during a s118-145 absence. Under the post-2027 reform, established-residential rental losses go to a loss pool. This rule applies based on the property being income-producing — NOT based on its CGT status — so the loss-pool quarantine applies during a s118-145 absence period the same as any other rental.
• Stranded losses if MRE-exempt at sale. Carried-forward residential losses can be offset against future residential rental income OR future residential capital gains. If your sale is fully MRE-exempt, there's no gain for the pool to offset — so the losses persist (not extinguished) but are stranded unless you hold another residential investment property. The calculator surfaces this in the headline fineprint.
• The strategic angle for new buyers (2026+). Under the post-2027 reform, negative gearing on a new established-residential investment goes to the quarantine pool — wiping out the long-standing tax shield. This makes the PPOR → conversion strategy uniquely attractive: buy as your home, live in for ≥6 months to genuinely establish main-residence status, then convert to a rental under s118-145. You get the s118-192 cost-base reset (wiping pre-rental gain), the loss-pool absorption against any past-cliff CGT, AND main-residence exemption for any sale within 6 years. This is now the only way to get tax-friendly leverage on an established residential property for personal investors.

Income tax during the rental period

• Rent is fully assessable, all ordinary rental deductions allowable: loan interest, council rates, water, insurance, repairs, management fees, advertising, body corporate, land tax.
• Div 43 capital works depreciation (2.5%/yr) available where construction was post-15 Sep 1987. Div 40 plant depreciation only on new items purchased by you (post-2017 restriction for second-hand residential).
• Div 43 clawback (s110-45): Capital works deductions claimed during absence reduce the cost base at sale, increasing any taxable gain. The calculator applies this clawback automatically.
• State land tax applies during the rental period (PPOR is exempt; rental is not). Not modelled in this calc — add to your tax bill manually if it materially affects your decision.

What this calculator captures

• Per-year cashflows during each rental period (rent received, interest, holding, tax, rent paid elsewhere).
• s118-145 6-year window tracking per absence period (multiple absences supported).
• s118-185 partial CGT apportionment when an absence exceeds 6 years.
• s118-192 mandatory cost-base reset at first move-out (auto-calculated, user can override).
• s110-45 Div 43 clawback against the cost base at sale.
• Post-2027 loss pool accumulation during rental + drawdown against any taxable gain at sale; stranded losses flagged.
• 2-strategy side-by-side comparison: PPOR-first conversion (Strategy A) vs direct investment from day 1 (Strategy B), with periods-table control of Strategy A's timeline. Each strategy carries its own resident and non-resident sale outcome; the active scenario drives the headline based on the residency toggle + life-events flag.
• Joint ownership (50/50 split of rental income, losses, and CGT across two earners' marginal rates).
• Stage 3 tax cut brackets including 2% Medicare; top rate 47% assuming private hospital cover.
• IO vs P&I repayment toggle. Interest-only (default, balance constant — every dollar of interest is deductible during rental years). Or principal-and-interest (loan amortises over user-set term, default 30yr — lower total interest, slightly higher tax during rental from reduced deduction, principal repaid returns as equity at sale). For Strategy A, the monthly payment is recalculated at the OO → Investor rate switch using the remaining loan term, mirroring AU lender behaviour.
• Interpretive commentary under the side-by-side comparison surfacing two nuances the headline $-delta hides: (1) CPI indexation applies to BOTH strategies — at high CPI, Strategy A's MRE advantage can be de minimis; (2) "rent paid elsewhere" direction can flip the cashflow advantage between strategies, and renting somewhere nicer than you could mortgage is itself a legitimate Strategy A play (you capture lifestyle value while keeping capital-growth exposure).

What this calculator doesn't capture

• State land tax during the rental period (PPOR is exempt; rental triggers it). Adds materially in NSW/VIC/QLD for higher-value land — apply manually if relevant.
• Stamp duty on the purchase. Both strategies pay the same stamp duty on the same property (you're modelling the buy-strategy decision, not the choice of property). For a stamp-duty deep-dive including OTP concessions in VIC/NSW/QLD/WA, see the Returns calculator.
• Multiple PPOR overlaps (e.g., you buy a new home during the absence — must nominate which is your main residence). The calc assumes you do NOT claim another PPOR during the absence.
• Day-apportionment across 1 July 2027 (mixed pre/post-reform CGT). Simplified: post-2027 regime applied to the full taxable portion.
• Interest rate switching from owner-occupier to investor rate during the rental period (typical 0.2-0.5pp higher). Adjust the "Interest rate" input manually if material.
• Refinance fees on rate switch at conversion (typical $400-800 discharge + new application costs) — not modelled. P&I monthly payment IS recalculated when the rate changes from OO to Investor in Strategy A, reflecting how AU lenders behave, but no transactional fees applied.
• Unequal joint ownership (e.g., 70/30 tenants-in-common). Joint mode is strictly 50/50.

Tax bracket source

• ATO — Tax rates Australian residents 2024-25. Top bracket modelled at 47% = 45% income + 2% Medicare. Calculator assumes you hold adequate private hospital cover; without it, MLS Tier 3 lifts the top rate to 48.5%.

Drafting and legislative uncertainty

• Legislation not yet passed. The post-2027 regime was announced in the May 2026 Federal Budget. Loss-pool mechanics (taxpayer-level vs property-level; treatment on final disposal of a residential portfolio) should be confirmed against the Exposure Draft when it's released. The "stranded losses" finding above is a strong-but-not-bulletproof reading of the announced framework.
• Re-occupation duration requirements have no ATO-defined minimum. The calculator's 3/6 month risk bands reflect practitioner consensus, not statutory rules. Document your re-occupation evidence carefully if challenged.
• Non-resident exception cases (life events) are narrow. The calc surfaces a life-events toggle that preserves Strategy A's main-residence exemption even when sold while non-resident, but the qualifying circumstances are tightly drawn (terminal medical condition, death in the family, divorce/separation, and similar). Verify your specific situation with a registered tax agent before relying on this carve-out.