Should You Use Your Bonus to Pay Off Your Mortgage?

A lump sum can reduce debt, remain accessible for planned or emergency costs, or be used for another goal. Compare the measurable costs, risks and access consequences rather than assuming one allocation is optimal.

The Case for Mortgage Prepayment

Paying principal earlier can reduce future mortgage interest. It is not the same as earning a guaranteed investment return: the result depends on the applicable rate, repayment schedule, remaining term, fees and contract, and comparisons with savings or investments should include their own tax, fee, risk and liquidity treatment.

Reducing principal can reduce the interest calculated on the outstanding balance, but there is no universal savings multiple. Ask how the lender will apply the payment and model the actual balance, rate path, remaining term, repayment schedule and charges.

Beyond the mathematics, there is psychological value in reducing debt. Watching your mortgage balance decrease faster than expected provides motivation and a sense of progress. For many people, the peace of mind that comes from owing less outweighs the potential benefits of alternative uses for the money.

When to Prioritise Other Goals First

Before allocating a windfall, list each debt's actual rate, fees, security, repayment terms and consequences. Paying a higher-cost debt can reduce more finance cost, but priorities also depend on cash access, arrears, hardship risk and the household plan.

Accessible emergency savings also matter. Sorted suggests starting with $1,000 and then working towards three to six months of expenses, while noting that the suitable amount differs by circumstances. Treat this as general education and test what access your household needs before reducing liquid savings.

Consider upcoming large expenses as well. If you know you will need to replace your car, renovate your kitchen, or fund another major expense within the next year or two, keeping money accessible might be wiser than locking it into your mortgage. Once money goes toward principal reduction, getting it back requires refinancing or establishing a revolving credit facility.

Practical Considerations for Prepayment

Before transferring money, check the loan's written extra-repayment and early-repayment terms. There is no reliable market-wide 5% allowance; a fixed-term contract may permit a charge, and the lender can provide a current quote for the proposed amount and date.

Floating, revolving-credit and split-loan repayment rights, fees and access rules are contract-specific. Confirm the terms for each portion rather than assuming repayment is unlimited, penalty-free or best directed to one structure.

Ask the lender how an extra payment will be applied and whether the regular payment or term changes. Different repayment paths do not necessarily save the same interest, so compare updated schedules and total cost before choosing.

The Alternative: Investing Instead

Investing is a different risk decision from repaying debt. Do not assume a historic market return or a fixed spread over the mortgage rate; compare uncertain after-fee and after-tax investment outcomes with the loan's actual interest and contract terms over the same time horizon.

Investment returns can be negative and tax treatment varies by investment and investor. Mortgage interest savings are more predictable than market returns but still depend on the loan rate, timing, fees and repayment treatment; liquidity and access also differ.

There is no suitable default split. Compare debt costs, accessible savings, upcoming expenses, investment risk, fees, tax treatment and time horizon, and use a regulated financial adviser for a personalised investment recommendation.

Making Your Decision

There is no universally correct answer to whether you should put your bonus toward your mortgage. The right choice depends on your interest rates, existing debt, emergency fund status, upcoming expenses, investment experience, and personal values around debt and risk.

Record the options and compare them against the household budget and goals. Paying debt, retaining accessible savings, investing or spending can each have different consequences; this article cannot determine the right allocation for an individual.