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Existing mortgage holders

If you already have a mortgage, the useful questions change: could you get a better rate, do you need extra borrowing, or can you clear the mortgage sooner?

Page checked: 21 October 2026

Switching

Switching can save money if a lower rate or better overall deal outweighs the costs. The process can involve a new affordability assessment, documents, valuation and legal work. Compare the total cost, not just the headline rate or cashback.

Top-ups

A top-up increases borrowing against your home. The amount available depends on the lender and your circumstances; there is no single universal top-up LTV limit or minimum amount. Fees, valuation costs, breakage charges and additional interest can apply.

Overpayments

If your lender applies an extra payment directly to capital, it can reduce future interest and shorten the term. Fixed-rate restrictions can apply, so check the terms before making a lump sum or regular extra payment.

Mortgage-free planning

Use the remaining balance, rate and term to estimate when the mortgage will end. Then model an extra €50, €100, €250 or €500 per month to see how the date changes. The result is illustrative and depends on how your lender treats overpayments.

A good annual mortgage review

  1. Check your current rate.
  2. Check your current balance and LTV.
  3. Find out when your fixed period ends.
  4. Ask your lender what cheaper existing-customer options are available.
  5. Compare the cost of switching.
  6. Review whether overpayments fit your cash buffer and other debts.

FAQ

Can I switch without moving house?

Yes. A switcher mortgage moves an existing mortgage to a different lender or product without increasing the amount owed.

Does a switcher mortgage have to meet the normal LTI/LTV limits?

Switcher mortgages are exempt from the Central Bank's LTI and LTV mortgage-measure limits, but the new lender still assesses affordability and its own eligibility criteria.

Can I top up a fixed-rate mortgage?

Possibly, but changing the terms can involve a breakage fee and other costs.

Related guides

SwitchingCompare your options →Top-upUnderstand extra borrowing →OverpaymentsReduce interest/term →

Official sources

Information is for general information only. Mortgage rules, lender criteria, rates and costs can change. Confirm the current position with the relevant lender or official source before acting.

Four useful checks for existing borrowers

If you already have a mortgage, the most useful questions are often about the rate, remaining balance, remaining term and flexibility. A lower rate may reduce repayments or allow more of the payment to reduce capital. An overpayment can shorten the term or reduce future interest. A top-up can release additional borrowing, but it also increases the debt secured on your home.

For switching, compare the complete cost rather than just the headline rate. Include breakage charges where relevant, legal or valuation costs, cashback conditions and the effect of your current loan-to-value position.

Choose the right calculator

Use the switching savings calculator to estimate a rate change, the overpayment calculator for extra payments, and the top-up guide when considering additional borrowing.

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