Mortgage & Investing

Is it better to pay off my mortgage faster or invest?

Paying off your mortgage faster gives you a certain reduction in debt and interest. Investing gives your spare money the chance to grow, but the final result is uncertain.

Quick answer

The better path depends on your figures, assumptions and priorities. The same Mortgage Decision Engine compares paying the mortgage off faster with investing; this page does not use a separate calculation.

What are the two choices?

Suppose you have money left over each month after paying your usual bills.

You could use it to:

make extra payments towards your mortgage
invest it while continuing with your normal mortgage payments

The same money is used in both paths. What changes is where it goes and what it produces.

What happens if you pay off the mortgage faster?

An overpayment is added to your normal mortgage payment.

Your normal payment covers the interest charged by the lender and repays part of the capital you borrowed. The overpayment reduces that capital further.

Future interest is then calculated on the reduced mortgage balance.

As a result:

less interest may be charged
the mortgage balance falls more quickly
the mortgage may be cleared sooner
your normal mortgage payment may become available earlier

The financial benefit is linked to your mortgage rate. It does not depend on investment markets.

What happens if you invest instead?

You continue making your normal mortgage payment and put the spare money into an investment.

Your mortgage is not reduced any faster, so you continue paying interest according to its existing schedule.

The invested money may grow over time. The longer it remains invested, the more opportunity it has to grow on earlier returns.

But investment returns are not guaranteed. The value may rise, fall or grow by less than assumed.

Why paying off the mortgage sooner is not automatically better

Becoming mortgage-free earlier can feel like an obvious financial win.

But once the mortgage has been cleared, the comparison should continue.

If one path clears the mortgage six years early, for example, the money that was previously used for the mortgage payment becomes available during those six years.

Wayli assumes that released payment is invested until the end of the original mortgage term. This allows both choices to be compared over the same period.

Without this step, the value of paying the mortgage off early would be understated.

Which choice could leave you with more?

Paying the mortgage faster may be stronger when:

your mortgage rate is high
investment returns are lower
you value a certain reduction in debt
you want to become mortgage-free sooner

Investing may finish ahead when:

the investment return is higher
the money remains invested for a long time
you accept that the outcome is uncertain
keeping the money accessible matters to you

Compare both paths

Enter your mortgage balance, rate, remaining term, payment, spare cash and assumed investment return. Wayli will show how much sooner the mortgage could be cleared and how the overall financial result compares with investing.

Compare paying off the mortgage faster with investing

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Educational comparison only. Returns are not guaranteed. This is not personalised financial advice; check your mortgage terms and early repayment charges.