Investments

First published March, 2025

Updated September, 2026

Discover the key differences between term deposits and bonds, including income potential, diversification benefits, liquidity and risk. Learn how each investment works and how they can help generate stable returns in today's changing interest rate environment.

By John Kroustalis, NAB Private Wealth

Term deposits and bonds are key components of the fixed income category, offering investors potential stability and regular income. Understanding their distinct characteristics can help you make more informed investment decisions in today’s changing interest rate environment.

Term Deposits Explained

A term deposit is a fixed amount of money invested for a specified period at a guaranteed interest rate with an Authorised Deposit-taking Institution (ADI) recognised by APRA. These include:

• Banks
• Credit unions
• Building societies

Key Features:

• Individual agreement between investor and financial institution
• Generally considered risk-free (deposits of up to $250,000 per account holder, per ADI are protected by the Australian Government’s Financial Claims Scheme)
• Hold-to-maturity investment with early access available with 31 days’ notice
• As at 28 September 2026, major-bank 12-month term deposit rates are about 4.75%–5.30% p.a., or approximately 40–95 basis points above the 4.35% RBA cash rate.[1]
• Typical terms range from 90 days to 12 months with major banks
• Interest typically paid at maturity

Bonds Explained

A bond represents a debt security where an investor lends money to a borrower (government, bank, insurer, or corporation) for a fixed period.

Key Features:

• Standardised instruments that trade in secondary markets.
• Settlement typically within 2-3 days (subject to market liquidity).
• Available with fixed or floating interest rates (fixed margin over benchmarks like the 90-day bank bill rate).
• In September 2026, corporate bonds were priced at approximately 70-195 basis points (0.70%-1.95%) above risk-free rates for investment-grade issues.[2]
• Interest (coupon payments) typically paid quarterly or semi-annually.
• Strong liquidity for larger, highly rated bond issues.

Types of bonds 

1. Fixed Rate Bonds – pay a consistent rate of interest, known as the coupon rate, over the life of the bond. This can provide a stable income stream for investors as the coupon amount will not change. Coupons are usually paid semi-annually from date of issuance. In the Australian market, fixed rate bonds for corporate issuers range typically from 5 to 10 years in term, while fixed rate bonds for state and federal government can be issued for much longer terms (10 years and beyond).
2. Floating Rate Notes – pay a variable rate of interest that is calculated as a fixed margin over a variable interest rate benchmark, typically the Bank Bill Swap Rate for Australian dollar issues. Coupons are usually paid quarterly from date of issuance, and the coupon will be calculated each quarter as the sum of the Bank Bill Swap Rate plus the fixed issue margin. In the Australian market, Floating Rate Notes are typically issued for terms of 3 to 7 years. Financial institutions such as banks tend to dominate Floating Rate Note issuance in Australia.
3. Inflation linked bonds – pay a fixed coupon on a principal amount that is indexed to inflation, so in a rising inflationary environment, the coupon will increase on each indexation period. This should protect investors from inflation risk. These types of bonds are typically issued for longer terms of 20 years or more.

Risks of bonds

1. Credit Risk – that the bond issuer will not be able to repay interest and/or principal due on the bond. In Australia, only 3 investment grade bond issuers have defaulted – Pasminco, HIH and Babcock & Brown. Statistically speaking, there is an extremely low probability of an investment grade issuer defaulting. At the other end of the spectrum, sub-investment grade bonds carry higher credit risk and therefore higher default probabilities.
2. Interest Rate Risk – prices for fixed-rate bonds generally fall when market rates rise and increase when rates fall. Holding a bond to maturity returns its face value, while selling earlier may result in a capital gain or loss. Floating Rate Notes are less sensitive to rate movements because their coupons reset regularly.

Market Context (September 2026)

In a “higher for longer” interest rate environment, bonds can offer attractive income as yields remain elevated. Floating Rate Notes may benefit as their coupons reset with prevailing rates, while fixed-rate bonds can lock in higher income but may experience price volatility if market yields remain elevated. Holding high-quality bonds to maturity can provide greater certainty of income and capital repayment. 

Portfolio Considerations

From a diversification perspective, bonds may offer significant advantages, including:

• Protection during economic uncertainty
• Potential capital appreciation when high-quality fixed-rate bonds are held during economic downturns
• Broader issuer and risk profile selection
• When bonds are issued by banks, they rank below term deposits on the capital structure and therefore often offer a higher relative return

Conclusion

While term deposits offer simplicity and government guarantees, bonds typically provide greater diversification of benefits and potential for capital growth. Historically, term deposits have struggled to match the long-term performance of quality fixed-rate bonds. For comprehensive portfolio construction, bonds should be considered as they have potential to contribute to portfolio diversification and support income objectives.

Source:

[1] Big 4 Term Deposit Rates   

[2] Bloomberg

To discover more call 1300 683 106 or email us on investordesk@nab.com.au

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The information contained in this article is believed to be reliable as at September 2026 and is intended to be of a general nature only. It has been prepared without taking into account any person’s objectives, financial situation or needs. Before acting on this information, NAB recommends that you consider whether it is appropriate for your circumstances. NAB recommends that you seek independent legal, property, financial and taxation advice before acting on any information in this article. ©2026 NAB Private Wealth is a division of National Australia Bank Limited ABN 12 004 044 937 AFSL and Australian Credit Licence 230686.