Real Numbers: After‑Tax Cashflow on Investment Loans Before and After Reforms

For most investors, after‑tax cashflow on an investment loan will be weaker after the 2026–27 negative gearing reforms, especially for established properties bought after 12 May 2026 that won’t be able to offset rental losses against salary from 1 July 2027. You need to model pre‑ and post‑reform cashflow before you buy, restructure or sell.

Here’s the quick rule of thumb:

If your investment was relying on a big tax refund to feel affordable, assume that refund shrinks or disappears under the new rules and check whether the property still works on its own numbers.

Tax reforms change after‑tax cashflow even when rent and interest stay the same.

Example 1: Negatively geared unit – before vs after reforms

Assumptions (illustrative only):

• Purchase price: $800,000 established unit (settles July 2026)
• Loan: $720,000 interest‑only, 6.5% p.a.
• Gross rent: $750 per week = $39,000 p.a.
• Non‑finance costs (rates, strata, insurance, maintenance, management): $12,000 p.a.
• Depreciation and capital allowances: $4,000 p.a.
• Investor on marginal tax rate ~37% + Medicare (assume 39%).

Step 1: Pre‑tax cashflow

• Interest: 6.5% × $720,000 = $46,800
• Non‑finance costs: $12,000

Cashflow before tax and depreciation:

• Rent: $39,000
• Less interest and cash expenses: $46,800 + $12,000 = $58,800
• Pre‑tax cashflow (actual dollars): -$19,800 p.a.

This is the real out‑of‑pocket cost before tax and non‑cash deductions.

Step 2: Tax position under current rules

For tax, you also deduct depreciation:

• Deductible expenses for tax: $58,800 + $4,000 = $62,800
• Taxable rental loss: $39,000 − $62,800 = -$23,800

At a 39% marginal rate:

• Tax saving from negative gearing: 39% × $23,800 ≈ $9,282

After‑tax cashflow:

• Pre‑tax cashflow: -$19,800
• Plus tax saving: +$9,282
• After‑tax cashflow (current rules): about -$10,500 p.a. (~-$200 per week)

The investor is still cashflow negative, but the tax refund softens the blow.

Step 3: Tax position after reforms (loss quarantined)

Under the reforms (per the 2026–27 Budget and the Tax Reform No.1 Bill), many established residential properties bought after 12 May 2026 will have rental losses quarantined. In simple terms, you can’t use the loss to reduce your salary; it can usually only offset future rental income or gains from that property.

Mechanically, your pre‑tax cashflow stays exactly the same:

• Still -$19,800 p.a. out of pocket.

But now, the loss no longer produces a $9,282 refund against your wages.

So:

• After‑tax cashflow (loss quarantined): about -$19,800 p.a. (~-$380 per week)

That’s almost $180 per week worse purely from the tax rule change, with the same rent, rate and expenses.

Example 2: Near‑neutral townhouse – tipping into pain after reforms

Not every property is highly negatively geared. Many investors deliberately target near‑neutral cashflow. The reforms still matter; they can turn a small, manageable shortfall into something that strains buffers.

Assumptions:

• Purchase price: $900,000 new townhouse (qualifies as a ‘new build’)
• Loan: $720,000 P&I, 6.2% p.a., 30‑year term
• Gross rent: $900 per week = $46,800 p.a.
• Non‑finance costs: $11,000 p.a.
• Depreciation/capital allowances: $6,000 p.a.

Approximate annual P&I repayment at 6.2%, 30 years: about $53,200

Split repayment into interest and principal (first year):

• Interest: roughly 6.2% × $720,000 ≈ $44,640
• Principal: $53,200 − $44,640 ≈ $8,560 (not deductible)

Step 1: Pre‑tax cashflow (actual dollars)

• Cash outgoings: interest $44,640 + non‑finance costs $11,000 + principal $8,560 = $64,200
• Rent: $46,800
• Pre‑tax cashflow: -$17,400 p.a. (~-$335 per week)

Step 2: Tax position – current rules (and likely for many qualifying new builds)

For tax, you deduct:

• Interest: $44,640
• Non‑finance costs: $11,000
• Depreciation: $6,000

Total deductible: $61,640

Taxable rental loss:

• $46,800 − $61,640 = -$14,840

Tax saving at 39%:

• Tax saving: 39% × $14,840 ≈ $5,788

After‑tax cashflow:

• Pre‑tax cashflow: -$17,400
• Plus tax saving: +$5,788
• After‑tax cashflow: about -$11,600 p.a. (~-$220 per week)

Under the current regime (and, based on Budget commentary, for many qualifying new builds going forward), the townhouse is mildly negatively geared but manageable for a high‑income household.

Step 3: If this were an established property under new rules

If you bought a similar established townhouse that doesn’t qualify for the new‑build concessions and its losses are quarantined:

• Pre‑tax cashflow remains -$17,400.
• No immediate tax offset against your salary.

So your after‑tax cashflow would now match pre‑tax: -$17,400 p.a. (~-$335 per week).

Again, that’s about $115 per week worse purely from the negative gearing change.

What these examples mean for real decisions this week

These are simplified but realistic numbers. They illustrate three critical points:

1. Pre‑tax cashflow is king. The rent, interest rate and non‑finance costs drive your actual bank balance. Tax should be a bonus, not the crutch the deal stands on.

2. The reform mainly hurts wage earners using losses to reduce salary tax on established properties. For many new builds and commercial assets, the rules are more favourable, but you need advice on the specific carve‑outs.

3. Buffers must be bigger for small business owners. If your drawings can fall 30–50% in a downturn, you can’t rely on a shrinking tax refund to prop up an investment loss. As we note in /insights/cashflow-modelling-real-world-numbers-geared-property, you should be able to cover at least 6–12 months of worst‑case property shortfall plus household and business overheads from accessible buffers.

If you’re self‑employed or on a high income, combine these examples with the strategic lens in /insights/self-employed-business-owners-high-income-professionals-negative-gearing-cgt-strategy before your next purchase or restructure.

For any serious property you’re considering, you want at least two models like the ones above, as outlined in /insights/cpa-mortgage-broker-after-tax-modelling-geared-property:

• Current rules vs post‑reform.
• Base interest rate vs +2–3% stress test.

Quick checklist: how to apply this to your numbers

This week, pull out one existing property or a deal you’re eyeing and run through:

1. Pre‑tax cashflow

   • Annual rent (after vacancy).
   • Less interest, principal, non‑finance costs.
   • Result in dollars per year and per week.

2. Tax position – now vs after reforms

   • Estimate deductible items (interest + non‑finance + depreciation).
   • Calculate rental profit or loss.
   • Ask: will this loss still reduce my salary tax, or will it be quarantined?

3. Buffer test

   • Can you cover 12 months of the after‑tax shortfall from cash/offsets, assuming no tax refund?
   • What if rates rise another 2%?

If those answers are uncomfortable, it’s time to reconsider price point, property type, or loan structure – not just chase a tax strategy that’s disappearing.

FAQs

Will existing negatively geared properties lose their tax benefits?
Most existing properties bought before the key Budget dates are expected to be grandfathered, meaning current negative gearing treatment generally continues, subject to final legislation. But new purchases of many established properties after 12 May 2026 are likely to face quarantined losses, so you can’t assume your next property will get the same tax outcome as your last.

Do these changes affect commercial property loans?
Based on current Budget guidance, the reforms are mainly targeted at residential property. Many commercial properties and certain large‑scale or institutional structures appear unaffected, but the overall tax settings (including CGT) still matter. You should still model pre‑ and after‑tax cashflow carefully, as commercial tenants, leases and incentives introduce different risks.

How accurate do my cashflow models need to be before I buy?
They don’t need to be perfect, but they must be realistic. Use conservative assumptions for rent, interest rates and maintenance, and run at least one stress test with higher rates or short vacancies. A CPA‑grade broker can help you turn the headline numbers into clear after‑tax cashflow so you can compare properties on like‑for‑like terms before committing.

Key takeaways

• After‑tax cashflow on negatively geared properties will usually worsen once rental losses on many established properties are quarantined.
• Focus on whether each property stands on its pre‑tax cashflow; treat any tax benefit as upside, not the reason the deal works.
• Small business owners and high‑income investors should revisit buffers, structures and property choice now, before the new rules fully apply.

To see these numbers for your own portfolio or a property you’re eyeing, book a free 15‑minute strategy call at /contact – your tax, your loan, one expert (CPA + Tax Agent + Broker) running the after‑tax cashflow in one conversation.

General advice only.