Overpay or Remortgage? A Side-by-Side Comparison

Why overpayment and remortgage are alternatives

When you have extra cash, two common moves are to overpay your mortgage or to remortgage onto a lower rate. Both can reduce the total interest you pay, but they work differently. Overpayments directly lower your outstanding balance, which cuts future interest charges and can shorten your term. Remortgaging reduces the interest rate on your remaining balance, which can lower monthly payments and total interest—if you secure a meaningfully better rate and factor in the costs.

The right choice depends on your current deal, your financial flexibility, and how much you value certainty. Overpayments are flexible but may be capped by your lender. Remortgaging can lock in savings but often involves fees and a new commitment. This page compares the two strategies side by side and offers a decision framework to help you weigh the trade-offs.

Sources: MoneySuperMarket, The Mortgage Broker

Key factors to compare: interest rates, fees, term, and flexibility

To decide between overpaying and remortgaging, you need to consider four main factors: the interest rate you’re paying, the fees involved, the impact on your mortgage term, and how much flexibility you want.

Interest rates: A lower rate on a remortgage can reduce your monthly payments and total interest, but you need to compare the new rate with your current one. Overpaying does not change your rate, but it reduces the balance on which interest is charged.

Fees: Remortgaging often involves arrangement fees, valuation fees, and possibly early repayment charges if you leave your current deal early. Overpayments may also trigger an early repayment charge if you exceed your lender’s annual limit—commonly 10% of your outstanding balance.

Term: Overpayments can shorten your mortgage term if you keep your regular payments the same. Reducing the term when you remortgage (i.e., choosing a shorter term) can also shorten it, but it usually means higher monthly payments.

Flexibility: Overpayments offer high flexibility—you can reduce or stop them if your circumstances change. Reducing your term or remortgaging to a new deal commits you to a different payment schedule. Since life can be unpredictable, that flexibility is often a key advantage of overpaying.

Sources: MoneySuperMarket, The Mortgage Broker

When overpayment wins

Overpaying is usually the better choice if you want to keep your options open. Because overpayments are voluntary, you can adjust them as your finances change. They also reduce your loan-to-value ratio, which can improve your chances of getting a better remortgage rate in the future.

Overpaying is especially attractive if you are on a standard variable rate (SVR) or a tracker mortgage, where lenders often allow unlimited overpayments without early repayment charges. In that case, you can aggressively pay down the balance without penalty.

However, before making overpayments, it’s generally wise to have an emergency fund and to clear any high-interest debts, such as credit cards or personal loans, since those cost more than most mortgage rates.

• You want flexibility to reduce or stop extra payments if needed.
• You are on a variable-rate deal with no overpayment limits.
• You want to build equity to qualify for a better remortgage rate later.
• Your mortgage rate is higher than what you could earn on savings (after tax) or the returns you expect from investments.

Sources: MoneySuperMarket, MoneySavingExpert.com

When remortgaging wins

Remortgaging to a lower rate can produce immediate savings on your monthly payments and total interest, especially if your current deal is ending and you have improved your loan-to-value ratio through overpayments or rising property values. If you are moving from a high standard variable rate to a fixed-rate deal, the savings can be substantial.

Remortgaging is also a way to restructure your mortgage—for example, to reduce your term and pay off the loan sooner. But this comes with higher monthly payments, reducing your flexibility.

The main drawback is cost. Remortgaging typically involves fees, such as arrangement and valuation fees, and possibly an early repayment charge if you exit your current deal early. You need to compare the total cost of remortgaging (including fees) against the interest savings over the term you expect to stay in the deal.

• Your current deal is about to end, and you can lock in a lower rate.
• You have enough equity to qualify for a significantly better loan-to-value rate band.
• The savings from a lower rate exceed the remortgage fees within a reasonable time.
• You prefer predictable payments and don’t need the flexibility of overpayments.

Sources: MoneySuperMarket, The Mortgage Broker

How to choose: a decision framework

There is no one-size-fits-all answer. The best choice depends on your specific circumstances. Here is a decision tree to guide you:

1. Build an emergency fund and pay off high-interest debts first. If you don’t have savings for unexpected expenses, overpaying or remortgaging might not be wise.

2. Check your current mortgage terms. Are you on a fixed rate with an annual overpayment limit (often 10%)? Overpaying beyond that could trigger an early repayment charge. Are you on a variable rate with no limit?

3. Compare your current mortgage rate with the rates available for remortgaging. If you can get a significantly lower rate, calculate the total savings after fees. If the savings are small, overpaying might be simpler.

4. Consider your flexibility needs. If you value the ability to reduce payments in a pinch, overpaying gives you that. If you are comfortable with a new commitment, remortgaging could save you money.

5. Evaluate your long-term goals. If you want to own your home sooner, both strategies can help, but overpaying is more flexible. If you want to lower your monthly costs, remortgaging to a lower rate might be better.

6. Factor in your loan-to-value ratio. If you are close to a lower LTV band, overpaying can boost your equity, which could unlock better rates when you do remortgage.

Sources: MoneySuperMarket, The Mortgage Broker

Combining both strategies

You don’t have to choose one over the other. In fact, many homeowners use overpayments to build equity and then remortgage to a lower rate once they reach a better loan-to-value bracket. This combined approach can maximise savings.

For example, you might overpay up to your lender’s annual limit for a year or two, reducing your LTV, then remortgage to a cheaper deal. The overpayments improve your rate eligibility, and the remortgage locks in the savings.

The key is to plan around your current deal’s overpayment limits and any early repayment charges. If you can overpay without penalty, do so. Then, when your deal ends, you can shop around for a better rate, using your improved LTV as leverage.

Sources: MoneySuperMarket, The Mortgage Broker

Side-by-side comparison: overpayments vs remortgaging

The table below compares overpayments, reducing your mortgage term, and remortgaging to a lower rate across the factors that matter most. Use it as a quick reference when weighing your options.

Sources: MoneySuperMarket, The Mortgage Broker, MoneySavingExpert.com