In short

Capital protected investment loans split interest under Division 247 into deductible loan interest (benchmarked to a comparable unprotected loan rate under s.247-20) and a non-deductible capital protection cost, capitalised as a put option premium under s.247-15. This split means the higher headline interest rate isn't fully tax-deductible, materially reducing the after-tax attractiveness the marketing for these products often implies.

For Australian investors considering capital protected investment loans — geared investment products where the borrower has a put option allowing them to walk away from the loan if the underlying assets fall below a defined protected level — the marketing typically emphasises the combination of geared upside exposure and capped downside risk. The structure is real and the protection is genuine: the borrower's potential loss is limited to the capital protection threshold rather than the full loan amount, with the lender absorbing any further fall via the walk-away option. The interest rate on the protected loan is typically higher than on an unprotected investment loan of the same character, reflecting the lender's downside risk-bearing. The tax-attractive aspect of the marketing — that the higher interest rate is fully deductible like any other investment loan interest — turns out to be incomplete. Under Division 247 of the Income Tax Assessment Act 1997, and specifically the treatment in section 247-15 (https://classic.austlii.edu.au/au/legis/cth/consol_act/itaa1997240/s247.15.html, accessed 14 May 2026), the interest paid on a capital protected borrowing is split for tax purposes between deductible loan interest (the portion equivalent to interest on a comparable unprotected loan) and a non-deductible capital protection cost (the excess interest above that benchmark, treated as a payment for a put option and capitalised rather than expensed). The split mechanism prevents borrowers from converting non-deductible put option premiums into deductible interest expenses, but it materially reduces the after-tax effectiveness of the capital protected structure compared to what naive marketing might suggest.

The basic structure of capital protected loans involves several components. A "capital protected borrowing" is defined in section 247-10 of the ITAA 1997 (https://classic.austlii.edu.au/au/legis/cth/consol_act/itaa1997240/s247.10.html, accessed 14 May 2026) — broadly, a borrowing under which the borrower is wholly or partly protected against a fall in the market value of the thing they use the borrowed money to acquire. The borrower takes a loan from the lender to invest in an underlying asset (typically listed shares, an index ETF, or a managed fund). The borrower pays interest on the loan from their cash flow, with the interest rate typically higher than for a comparable unprotected investment loan. The capital protection feature provides the borrower with a put option allowing them to walk away from the loan if the underlying investment falls below a specified threshold (often 100% of the loan principal, meaning the borrower can walk away if the investment is below the loan amount at maturity). The lender absorbs any loss below the protected threshold; the borrower's downside is capped. At maturity, the borrower either holds the investment (if it has performed acceptably) and repays the loan, or exercises the walk-away option (if the investment has fallen below the protected threshold) and surrenders the underlying investment to the lender in lieu of repayment.

The Division 247 split methodology divides the interest payments between two tax-distinct portions. The deductible loan interest is the portion equivalent to interest that would be charged on a comparable unprotected loan, worked out under section 247-20 (https://classic.austlii.edu.au/au/legis/cth/consol_act/itaa1997240/s247.20.html, accessed 14 May 2026) by reference to a prescribed benchmark rate. For capital protected borrowings entered into after 7:30 pm on 13 May 2008, the benchmark is the Reserve Bank of Australia's indicator variable rate for standard housing loans (the investor housing loan rate) plus 100 basis points. This benchmark portion is treated as ordinary investment-related interest, deductible against the borrower's investment income (dividends, distributions, capital gains realised in the year) under standard rules. The non-deductible capital protection cost is the excess interest above the benchmark — the additional rate that reflects the optionality value of the protection feature. Under s.247-15, this excess is treated as a payment for a put option and is capitalised rather than expensed — forming part of the cost base of the notional put option (a CGT asset) rather than being deductible against current income. The capital protection cost is therefore not deductible against current income but may be recovered, in part, at the eventual CGT event affecting the option.

The financial impact of the split is substantial. For a $200,000 capital protected loan at a 10% interest rate, total interest is $20,000 per year. If the s.247-20 benchmark rate works out to 7%, the deductible portion is $14,000 (the $200,000 × 7%) and the non-deductible capital protection cost is $6,000 (the $200,000 × 3% excess). For a high-marginal-rate investor at 47% (the top FY25-26 marginal rate plus Medicare levy), the deductible $14,000 produces a tax saving of $6,580. The non-deductible $6,000 is a real after-tax cash outflow with no current-year tax benefit (though it may be partially recovered through CGT mechanics affecting the option). The net after-tax cost of the capital protected loan in year one: $20,000 paid less $6,580 tax saving = $13,420 net cost. Compared to a similar unprotected loan at the 7% benchmark rate ($14,000 interest, $6,580 tax saving, net $7,420), the capital protection adds approximately $6,000 of after-tax cost annually — the real cost of the optionality.

The policy rationale for the split is to prevent the structure from converting non-deductible option premiums into deductible interest. Without Division 247, a borrower could pay 10% interest on a protected loan, deduct the full 10% against income, and effectively claim a tax deduction for what is functionally a put option premium. The split ensures that the optionality cost is treated like other capitalised option costs rather than expensed — appropriate tax policy alignment, but a consequent reduction in the after-tax attractiveness of the structure. The rule isn't punitive; it's clarifying — capital protection is a valuable feature, but its cost should be capitalised consistently with other option costs.

The capital cost treatment of the non-deductible portion has its own consequences for eventual outcomes. The capital protection cost forms part of the cost base of the notional put option. The CGT outcomes depend on what happens at maturity: if the borrower retains the investment and the put option lapses unexercised, the option's cost base produces a capital loss on the lapse (CGT event C2 for the ending of an intangible asset); if the borrower exercises the walk-away option, the option cost is dealt with under the relevant CGT rules for the exercise. Because option-related capital losses can generally only be applied against capital gains (not against ordinary income), the recovery of the capital protection cost is contingent on the investor having capital gains to absorb it. For investors who walk away from the loan because the investment has fallen, the practical recovery of the capitalised capital protection cost depends on the specific structure and the investor's broader CGT position — and may be limited.

For practical retirement-focused planning, capital protected loans are typically a niche structure. Most retirement-focused clients are better served by simpler arrangements: unleveraged investments with appropriate asset allocation, or where leverage is desired, conventional unprotected investment loans with stop-loss discipline (MoneySmart — borrowing to invest, https://moneysmart.gov.au/how-to-invest/borrowing-to-invest, accessed 14 May 2026; ATO — borrowing to invest, https://www.ato.gov.au/individuals-and-families/investments-and-assets/investing-in-shares/borrowing-to-invest-and-other-share-investment-strategies, accessed 14 May 2026). The capital protected structure makes sense for specific scenarios — investors who specifically want the downside protection for behavioural or risk-management reasons, who are willing to pay the optionality cost knowingly, who have specific tax circumstances that might mitigate the Division 247 erosion. For most clients, the marketing should be received with caution and the Division 247 implications should be modelled before commitment.

A specific issue for SMSF investors considering capital protected loans through Limited Recourse Borrowing Arrangements (LRBAs under sections 67A and 67B of the SIS Act 1993) is the additional layer of SMSF-specific rules. LRBA structures already have specific limitations (single acquirable asset, limited recourse, specific lender requirements), and capital protection features may interact with these constraints in non-obvious ways. SMSF investment strategy requirements demand that the trustee justify the investment in terms of fund member retirement benefits, with the leveraged-and-protected structure adding complexity to the strategy documentation. Sole purpose test considerations under SIS Act s.62 also apply. For SMSF clients considering capital protected loans, specialist SMSF lawyer and tax adviser engagement is appropriate before commitment — the layered complexity exceeds what most SMSF accountants and financial planners handle as routine work.

For practitioners advising clients on capital protected loans, the structured approach involves several elements. Confirm the product structure — capital protection feature, walk-away option, interest rate, and the date the borrowing was entered into (which determines the s.247-20 benchmark methodology). Calculate the Division 247 split based on the applicable benchmark rate. Model the after-tax economics including the non-deductible capital protection cost. Compare to alternative structures — unprotected loan with stop-loss discipline, unleveraged investment with appropriate asset allocation. Document for tax compliance — records of the split methodology, capital protection costs capitalised, and the eventual CGT treatment of the option. Coordinate with broader investment strategy — leveraged exposure, risk management, retirement planning fit. For substantial structures (loans of $500,000 or more), specialist tax advice is appropriate before commitment, and the ATO's current guidance should be confirmed since rulings and methodology have evolved over the years.

What do worked planning examples show?

These two cases show how the Division 247 split plays out for typical capital protected loan scenarios. Illustrative only — not personal advice — using FY25-26 figures and post-1-July-2024 stage-3 marginal tax rates.

Case 1 — Robert, 58, considering a $300,000 capital protected loan to invest in an ASX 200 ETF over a 5-year term. Loan rate 9.5%, with the s.247-20 benchmark working out to 7%. On these facts, the Division 247 split: total interest $28,500 a year, deductible $21,000 (7% × $300,000), non-deductible capital protection cost $7,500 a year. Over five years, accumulated capital protection cost is $37,500 — forming part of the cost base of the notional put option. At Robert's marginal rate (assuming his other income places the deduction in the $135,001–$190,000 bracket at 37%), the annual tax saving from the deductible portion is approximately $7,770. Net annual cost: $28,500 − $7,770 = $20,730. The $37,500 of capitalised capital protection cost is recovered, if at all, through the CGT treatment of the option at maturity — and only against capital gains, not ordinary income. Compared to an unleveraged investment with similar market exposure, the capital protected loan carries substantial annual after-tax cost (around $20,730 × 5 = $103,650 over the term) in exchange for the downside protection. The net economics depend on whether the ETF appreciates enough to justify the structure cost. The trap to avoid is taking the marketing at face value without running the Division 247 numbers.

Case 2 — Margaret, 65, considering a capital protected loan within her SMSF as part of a structured investment. On these facts, the analysis is more complex. SMSF LRBA-specific rules under SIS Act ss.67A and 67B apply alongside Division 247. SMSF investment strategy requirements demand documentation of why the leveraged-and-protected structure serves member retirement benefits. Sole purpose test compliance under s.62 must be addressed. The fund's tax position (15% accumulation rate, or exempt in retirement phase) affects the after-tax math differently from personal-name structures — and in retirement phase, where fund earnings are already tax-exempt, the deductibility of the loan interest portion has no value, undermining a key rationale for the structure. The rational pathway is to engage specialist SMSF lawyer and tax adviser before any commitment, modelling the structure thoroughly and confirming compliance across all the SMSF-specific rules. The trap to avoid is rolling capital protected loans into SMSFs without addressing the layered complexity — the structure can be technically permissible but operationally fraught and economically weak in pension phase.

For Australian investors considering capital protected investment loans, the Division 247 split is the structural feature that determines the after-tax economics. The interest split between deductible loan interest (benchmarked under s.247-20 to a comparable unprotected rate) and non-deductible capital protection cost (capitalised as a put option payment under s.247-15) substantially reduces the apparent tax-effectiveness of the capital protected structure compared to naive marketing claims. For most retirement-focused investors, simpler unleveraged or unprotected-leveraged alternatives produce better outcomes after the Division 247 erosion. For specific scenarios where capital protection is genuinely valuable (behavioural risk management, specific tax circumstances), the structure can make sense provided the after-tax economics are modelled honestly. The advice work is to surface the Division 247 split early in the conversation, model the actual after-tax cost, and compare to alternatives before any commitment.

Sources

Key takeaways

  • Under Division 247 of ITAA 1997, interest on a capital protected investment loan is split between deductible loan interest (benchmarked to a comparable unprotected loan rate) and a non-deductible capital protection cost representing the put option premium.
  • The deductible benchmark rate for post-13 May 2008 borrowings is the RBA's investor housing loan indicator rate plus 100 basis points — everything paid above that benchmark is the non-deductible capital protection cost.
  • The non-deductible capital protection cost is capitalised into the cost base of the notional put option rather than deducted against income, and can generally only be recovered later against capital gains, not ordinary income.
  • On a $200,000 loan at 10% with a 7% benchmark, only $14,000 of the $20,000 annual interest is deductible — the $6,000 protection cost is a real after-tax cost that materially erodes the structure's apparent tax efficiency.
  • For SMSFs, capital protected loans add Limited Recourse Borrowing Arrangement complexity on top of Division 247, and in retirement phase — where fund earnings are already tax-exempt — the interest deductibility has no value at all, undermining a core rationale for the structure.

Frequently asked questions

Is the interest on a capital protected investment loan fully tax-deductible?

No. Under Division 247 of ITAA 1997, only the portion of interest equivalent to a comparable unprotected loan rate is deductible. The excess interest, reflecting the cost of the capital protection (walk-away) feature, is treated as a non-deductible put option premium and capitalised instead.

How is the deductible portion of capital protected loan interest calculated?

Under s.247-20, for borrowings entered into after 13 May 2008, the benchmark deductible rate is the RBA's investor housing loan indicator rate plus 100 basis points. Interest paid up to that benchmark rate is deductible; anything above it is the non-deductible capital protection cost.

Can I recover the non-deductible capital protection cost on a protected loan?

Potentially, but only in limited circumstances. The capital protection cost forms part of the cost base of the notional put option, so it may produce a capital loss when the option lapses or is exercised — but that loss can generally only offset capital gains, not ordinary income, so recovery depends heavily on your broader CGT position.

Are capital protected loans a good fit for SMSFs?

Usually not without specialist advice. They add Limited Recourse Borrowing Arrangement complexity under SIS Act ss.67A and 67B on top of the Division 247 tax split, and in retirement phase — where fund earnings are already tax-exempt — the interest deductibility provides no benefit at all, weakening the case for the structure.

A note on advice. This article is general information only and doesn't account for your personal circumstances. Everyone's situation is different — before acting, it's worth talking it through with a licensed adviser who knows your full picture.