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What is the cost of setting up a Retirement Interest Only mortgage?

13th February 2026

By ProMoney

A Retirement Interest Only (RIO) mortgage is designed for older homeowners in the UK who want to release equity or remortgage their existing property without the burden of capital repayments until a defined life event occurs (typically the homeowner’s death or moving into long-term care). While RIO mortgages can provide valuable flexibility in retirement, it is essential to understand the full financial commitment involved, starting with the initial setup charges.

Understanding What is the Cost of Setting Up a Retirement Interest Only Mortgage?

The total cost associated with obtaining a RIO mortgage can be separated into two main categories: upfront setup costs and ongoing monthly costs. The setup fees are generally non-refundable and must be paid either directly or added to the loan balance when the mortgage completes.

Upfront Setup Costs Associated with a RIO Mortgage

The total amount you pay to get your RIO mortgage agreed upon and registered can vary significantly between lenders and depends on the complexity of your financial situation and the value of your property. These costs are similar to those incurred when setting up a standard residential mortgage.

1. Lender Arrangement or Product Fees

This is the fee charged by the lender for arranging the mortgage product itself. It is sometimes referred to as a completion fee or product fee. These fees vary widely, generally falling between £0 (if the lender is offering a fee-free product, often offset by a higher interest rate) and up to £2,000 or more for products with highly competitive interest rates.

  • Payment Options: You typically have the choice to pay this fee upfront or add it to the loan balance. While adding it to the loan means lower immediate costs, it increases the total amount of interest you will pay over the lifetime of the mortgage.

2. Valuation Fees

Lenders require an independent valuation of your property to confirm its market value and ensure it provides adequate security for the loan. The cost of this valuation is usually borne by the borrower. Valuation fees depend primarily on the property’s value and location.

  • For standard residential properties, valuation fees might range from £300 to £700, but they can be significantly higher for properties valued over £1 million or those with unusual construction.
  • Some lenders may offer free valuation services as part of a promotional package, though this is less common with specialist later-life products.

3. Legal and Conveyancing Fees

Solicitors or licensed conveyancers are required to handle the legal aspects of the transaction, ensuring the mortgage is properly registered and that any existing charges (like previous mortgages) are legally discharged. Since a RIO mortgage is a regulated product, legal work is mandatory.

  • Legal fees typically range from £500 to £1,500, depending on the complexity of the transfer, whether you are simply remortgaging, or if there are other legal aspects involved (such as transferring ownership into joint names).
  • You may also incur disbursements, which are third-party costs covered by your solicitor, such as Land Registry fees and local authority search fees (if applicable, though usually minimal for a simple remortgage).

4. Broker or Advice Fees

RIO mortgages are complex products, and seeking regulated financial advice is highly recommended, often mandatory, before proceeding. A mortgage broker specialising in later-life lending can help you navigate the market and find the most suitable product.

  • Broker fees can be charged as a percentage of the loan amount (typically 0.5% to 1.5%) or as a flat fee (ranging from £500 to £2,000).
  • Some brokers are paid entirely by commission from the lender, meaning they charge the client no direct fee, but the client must ensure the advice remains impartial.

It is crucial to get a clear breakdown of all these upfront costs in a formal Key Facts Illustration (KFI) document provided by the lender or broker before you commit.

Understanding Ongoing Monthly Costs: Interest Payments

Unlike traditional Equity Release products where interest typically rolls up and is repaid when the property is sold, a Retirement Interest Only mortgage requires the borrower to pay the interest accrued each month. This is the defining feature of a RIO mortgage and represents the most significant ongoing cost.

Interest Rate and Affordability

The interest rate you secure will dictate the size of your monthly payment. RIO interest rates are competitive compared to standard mortgages but can vary based on the Bank of England base rate, the lender’s specific product offering, and your Loan-to-Value (LTV) ratio.

  • You must prove to the lender that your retirement income (e.g., state pension, private pensions, investments) is sufficient to comfortably cover these monthly interest payments for the entire anticipated term of the loan. This is a critical affordability check.
  • Failure to maintain interest payments can have serious consequences. Your property may be at risk if repayments are not made. Potential consequences include legal action, repossession proceedings, increased interest rates, and additional charges.

Credit Checks and Affordability Assessment

When applying for a RIO mortgage, the lender will conduct thorough checks to verify your income and financial stability. This includes reviewing your credit file.

Understanding your credit score before applying can help identify potential issues that might affect your eligibility or the interest rate offered. Get your free credit search here. It’s free for 30 days and costs £14.99 per month thereafter if you don’t cancel it. You can cancel at anytime. (Ad)

Total Cost Over Time: The Impact of Adding Fees to the Loan

While many RIO fees can be added to the mortgage principal, borrowers must understand the long-term impact. If you borrow an additional £2,000 to cover fees, you will pay interest on that £2,000 for perhaps 10, 15, or even 25 years. This significantly increases the total cost of borrowing over the lifespan of the RIO mortgage.

It is often financially advantageous to pay the setup fees upfront if your liquid capital allows, as this reduces the total interest paid over the term, which could potentially run into tens of thousands of pounds.

Comparing RIO Costs to Other Later-Life Products

When assessing the cost of setting up a Retirement Interest Only mortgage, it is helpful to benchmark it against its main alternative: Lifetime Mortgages (a type of Equity Release).

RIO vs. Lifetime Mortgages (Equity Release)

  • Upfront Setup Costs: Initial fees (valuation, legal, arrangement) are broadly similar for both RIO mortgages and Lifetime Mortgages.
  • Ongoing Cost Structure: This is the key difference.
    • RIO: High ongoing monthly cash outlay due to mandatory interest payments. The capital debt remains static (unless repayments are missed).
    • Lifetime Mortgages: Typically, no monthly payments are required. The interest rolls up, compounding the debt, meaning the final repayment amount is much higher than the initial capital borrowed. This carries a higher long-term cost burden against the property’s equity.
  • Suitability: RIO is suitable for homeowners who can comfortably afford the monthly interest payments but wish to avoid repaying the capital. Lifetime Mortgages are often better suited for those with limited retirement income who are willing to significantly reduce the equity passed onto beneficiaries.

If you are exploring later-life lending options, independent advice is essential to determine which structure aligns best with your financial goals and risk tolerance. For impartial guidance on later-life borrowing options, you can consult resources such as the MoneyHelper service, backed by the UK government.

People also asked

Can I add the RIO mortgage fees to the loan?

Yes, most lenders allow you to add arrangement, product, and sometimes valuation fees to the RIO mortgage balance. While this saves you immediate cash outlay, it increases the total debt, meaning you will pay interest on those fees for the entire duration of the loan, increasing the long-term cost.

How much deposit do I need for a RIO mortgage?

RIO mortgages are not structured like standard purchase mortgages requiring a deposit. Instead, the focus is on your existing equity. Lenders will assess your Loan-to-Value (LTV) ratio. Typically, RIO products are available up to 50% or 60% LTV, meaning you must retain 40% to 50% equity in the property.

Are RIO mortgages regulated by the FCA?

Yes, Retirement Interest Only mortgages are regulated by the Financial Conduct Authority (FCA) in the UK. This means lenders and brokers must adhere to strict rules regarding affordability checks, transparency, and suitability to ensure consumers receive fair advice and appropriate products.

What happens if I miss an interest payment on a RIO mortgage?

Missing an interest payment means you are in breach of your mortgage terms. The lender will initially try to contact you to remedy the situation. Repeated missed payments will ultimately lead to default, which could result in legal action, adverse impacts on your credit rating, and, in severe cases, the property being repossessed to recover the debt.

Summary of RIO Mortgage Costs

Setting up a Retirement Interest Only mortgage requires careful budgeting for several distinct expenses. You should anticipate initial costs totalling between £1,500 and £4,000, covering valuation, legal work, and lender/broker fees. However, the most significant long-term commitment is the mandatory monthly interest payment, which requires sustainable, provable retirement income. Always seek specialist, regulated advice to ensure the RIO product meets your needs and that the costs are clearly understood before proceeding.

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