--- title: "Retirement Interest-Only Mortgage Calculator — UK RIO | First Rung Now" description: "Free UK retirement interest-only (RIO) mortgage calculator. Work out maximum borrowing and monthly interest cost on a RIO mortgage in seconds." lang: en-GB json-ld: | [ { "@context": "https://schema.org", "@type": "Organization", "name": "First Rung Now", "url": "https://firstrungnow.com", "logo": { "@type": "ImageObject", "url": "https://firstrungnow.com/logo-512.png", "width": 512, "height": 512 }, "description": "Independent UK mortgage education and broker matching service.", "address": { "@type": "PostalAddress", "addressCountry": "GB" } }, { "@context": "https://schema.org", "@type": "WebSite", "name": "First Rung Now", "url": "https://firstrungnow.com" }, { "@context": "https://schema.org", "@type": "Article", "headline": "Retirement Interest-Only Mortgage Calculator", "description": "Free UK retirement interest-only (RIO) mortgage calculator. Work out maximum borrowing and monthly interest cost on a RIO mortgage in seconds.", "author": { "@type": "Organization", "name": "First Rung Now" }, "publisher": { "@type": "Organization", "name": "First Rung Now", "url": "https://firstrungnow.com" }, "mainEntityOfPage": "https://firstrungnow.com/retirement-interest-only-mortgage-calculator", "datePublished": "2026-06-15", "dateModified": "2026-06-15", "inLanguage": "en-GB" }, { "@context": "https://schema.org", "@type": "BreadcrumbList", "itemListElement": [ { "@type": "ListItem", "position": 1, "name": "Home", "item": "https://firstrungnow.com/" }, { "@type": "ListItem", "position": 2, "name": "Mortgage Calculators", "item": "https://firstrungnow.com/mortgage-calculators" }, { "@type": "ListItem", "position": 3, "name": "RIO Calculator", "item": "https://firstrungnow.com/retirement-interest-only-mortgage-calculator" } ] }, { "@context": "https://schema.org", "@type": "FAQPage", "mainEntity": [ { "@type": "Question", "name": "How does this RIO calculator work out my monthly cost?", "acceptedAnswer": { "@type": "Answer", "text": "It multiplies your chosen loan (property value × LTV) by the annual interest rate and divides by 12 to give the interest-only monthly payment. There is no capital repayment line because RIO products never amortise — the balance stays flat until a trigger event (sale, long-term care or death) settles the loan." } }, { "@type": "Question", "name": "Who qualifies for a RIO mortgage?", "acceptedAnswer": { "@type": "Answer", "text": "Usually borrowers aged 55+ with provable pension or other retirement income that comfortably covers the monthly interest payment. Lenders apply the same affordability standards as a standard mortgage." } }, { "@type": "Question", "name": "How much can I borrow on a RIO mortgage?", "acceptedAnswer": { "@type": "Answer", "text": "Most lenders cap LTV at 50–65%, depending on the lender and borrower age. A £400,000 home typically supports £200,000–£260,000 of borrowing." } }, { "@type": "Question", "name": "What rates apply to RIO mortgages?", "acceptedAnswer": { "@type": "Answer", "text": "Typical 5-year fixed RIO pricing in 2026 sits at 5.5–6.5%, similar to standard residential rates but with tighter LTV caps." } }, { "@type": "Question", "name": "Is a RIO better than equity release?", "acceptedAnswer": { "@type": "Answer", "text": "Usually cheaper because there's no compounding interest. The trade-off is you must pass affordability and make monthly payments — equity release doesn't require either." } } ] } ] --- [Skip to content](#main) [London 020 8088 2997 ](tel:02080882997)[National 0333 567 1185 ](tel:03335671185) [![First Rung Now](/assets/logo-mark-CNo3p3DP.png) First Rung Now UK Mortgage Guides ](/) - Mortgages - Remortgages - Buy To Let - Bad Credit - Calculators - Guides - [Find a Broker](/find-a-mortgage-broker) - [About](/about) [London 020 8088 2997 ](tel:02080882997)[National 0333 567 1185 ](tel:03335671185) [Speak to a Vetted Broker](/find-a-mortgage-broker) 1. [Home](/) 2. [Mortgage Calculators](/mortgage-calculators) 3. RIO Calculator UK Mortgage Guide # Retirement Interest-Only Mortgage Calculator (UK) A retirement interest-only (RIO) mortgage lets borrowers aged 55+ release capital from their home while paying only the monthly interest. This calculator gives an instant view of monthly cost and maximum borrowing under typical UK lender criteria. First Rung Now Editorial Updated 15 June 2026 7 min read On this page 1. [Key takeaways](#key-takeaways) 2. [RIO Calculator](#rio-calculator) 3. [How a RIO mortgage works](#how-a-rio-mortgage-works) 4. [Who can qualify](#who-can-qualify) 5. [Typical UK RIO lenders](#typical-uk-rio-lenders) 6. [RIO vs equity release](#rio-vs-equity-release) 7. [Speak with a vetted mortgage broker about retirement interest-only mortgages](#speak-with-a-vetted-mortgage-broker-about-retirement-interest-only-mortgages) 8. [Frequently asked questions](#frequently-asked-questions) 9. [How does this RIO calculator work out my monthly cost?](#how-does-this-rio-calculator-work-out-my-monthly-cost) 10. [Who qualifies for a RIO mortgage?](#who-qualifies-for-a-rio-mortgage) 11. [How much can I borrow on a RIO mortgage?](#how-much-can-i-borrow-on-a-rio-mortgage) 12. [What rates apply to RIO mortgages?](#what-rates-apply-to-rio-mortgages) 13. [Is a RIO better than equity release?](#is-a-rio-better-than-equity-release) 14. [Related guides](#related-guides) 15. [All Mortgage Calculators](#all-mortgage-calculators) 16. [Overpay Mortgage or Pension?](#overpay-mortgage-or-pension) 17. [Remortgages Hub](#remortgages-hub) ### Calculators — related reads Interactive tools for borrowers and landlords. - [BTL interest-only calculator Stress-test ICR at 125%–145% and 5.5%–7% to find your maximum BTL loan. ](/buy-to-let-interest-only-calculator) - [HMO mortgage calculator Size your HMO loan using room rents, ICR and stressed interest rates. ](/hmo-mortgage-calculator) - [JBSP mortgage calculator Combined-income affordability when a parent supports the mortgage but stays off the title. ](/jbsp-mortgage-calculator) - [Mortgage buyout calculator Work out equity split, affordability and SDLT on a divorce or separation buyout. ](/mortgage-buyout-calculator-uk) - [Ltd company mortgage calculator ICR-driven max SPV BTL loan with worked 2026 examples. ](/ltd-company-mortgage-calculator) Explore the hubs [Mortgages explained](/mortgages)[Remortgages](/remortgages)[Buy-to-let mortgages](/buy-to-let)[Bad credit mortgages](/bad-credit-mortgages)[Mortgage calculators](/mortgage-calculators)[All mortgage guides](/mortgage-guides)[Find a mortgage broker](/find-a-mortgage-broker) ## Key takeaways - RIO mortgages pay interest only — capital repaid on sale, care or death. - Most UK lenders cap LTV at 50–65% for RIO products. - Affordability assessed against provable retirement income. - Cheaper than equity release because interest doesn't compound. - Available from Hodge, LiveMore, Aldermore, Family BS, Cumberland and Leeds BS. ### RIO Calculator Property value (£) LTV (%) Interest rate (%) Maximum loan £220,000 Monthly interest £1,098 Annual interest £13,176 ## How a RIO mortgage works Want a vetted broker to help with How a RIO mortgage works? Free FCA-regulated introduction. We carefully check the broker matches your scenario — no pressure, no upfront fees. [Match me with a broker](/find-a-mortgage-broker) A retirement interest-only mortgage is structurally simple. The lender advances a loan secured against your home. You pay the interest each month for as long as you live in the property. The capital is repaid in one of three trigger events: you sell the property, you move permanently into long-term residential care, or you die. The estate then repays the loan from the sale proceeds. Unlike a lifetime mortgage (equity release), the interest never rolls up and compounds. The loan balance stays constant for the life of the product. That makes RIO materially cheaper over a 15–20 year horizon than equity release, provided you can comfortably afford the monthly interest from retirement income. ## Who can qualify Calculators · keep reading - [BTL interest-only calculator Stress-test ICR at 125%–145% and 5.5%–7% to find your maximum BTL loan. ](/buy-to-let-interest-only-calculator) - [HMO mortgage calculator Size your HMO loan using room rents, ICR and stressed interest rates. ](/hmo-mortgage-calculator) Browse the full hub: [Mortgage calculators](/mortgage-calculators) Want a vetted broker to help with Who can qualify? Free FCA-regulated introduction. We carefully check the broker matches your scenario — no pressure, no upfront fees. [Match me with a broker](/find-a-mortgage-broker) RIO products are designed for borrowers aged 55+ who own their home outright or have a substantial existing mortgage they need to refinance into retirement. Lenders apply standard affordability assessment to monthly interest payments based on: - State pension - Defined-benefit or defined-contribution pension income - Annuity income - Rental income - Any continuing employment or self-employment income For joint applications, most lenders stress affordability to ensure the surviving spouse could afford payments alone after the first death — a critical safeguard given the trigger events. ## Typical UK RIO lenders Want a vetted broker to help with Typical UK RIO lenders? Free FCA-regulated introduction. We carefully check the broker matches your scenario — no pressure, no upfront fees. [Match me with a broker](/find-a-mortgage-broker) Active RIO lenders include Hodge, LiveMore, Aldermore, Family Building Society, Cumberland Building Society, Leeds Building Society, Marsden Building Society and Bath Building Society. Most price RIOs similarly to standard residential mortgages, with the trade-off being tighter LTV caps (typically 50–65%). ## RIO vs equity release Calculators · keep reading - [JBSP mortgage calculator Combined-income affordability when a parent supports the mortgage but stays off the title. ](/jbsp-mortgage-calculator) - [Mortgage buyout calculator Work out equity split, affordability and SDLT on a divorce or separation buyout. ](/mortgage-buyout-calculator-uk) Browse the full hub: [Mortgage calculators](/mortgage-calculators) Want a vetted broker to help with RIO vs equity release? Free FCA-regulated introduction. We carefully check the broker matches your scenario — no pressure, no upfront fees. [Match me with a broker](/find-a-mortgage-broker) The headline difference is interest treatment. RIO charges interest monthly; equity release rolls it up. Over a 20-year period at 6%, £100,000 borrowed via RIO costs £6,000/year in monthly interest (constant £120,000 total interest over 20 years, capital still owed). The same £100,000 via equity release at 6% rolled up becomes a debt of roughly £321,000 — eating most of the equity from the original property. RIO is almost always cheaper if you can afford the payments. Equity release suits borrowers who can't pass affordability or who want zero monthly outgoings. Vetted UK Broker Match ### Speak with a vetted mortgage broker about retirement interest-only mortgages Free, no-obligation introduction to an FCA-regulated adviser with experience in your specific scenario. We've done the due diligence so you don't have to. - FCA-regulated only - Typical reply in 1 working day - No upfront fees [Match me with a broker](/find-a-mortgage-broker) ## Frequently asked questions ### How does this RIO calculator work out my monthly cost? ### Who qualifies for a RIO mortgage? ### How much can I borrow on a RIO mortgage? ### What rates apply to RIO mortgages? ### Is a RIO better than equity release? ## Related guides [ ### All Mortgage Calculators Repayment, affordability, LTV and BTL tools. Read guide ](/mortgage-calculators)[ ### Overpay Mortgage or Pension? Strategic capital allocation in mid-career. Read guide ](/overpay-mortgage-or-pension)[ ### Remortgages Hub Switching mortgages including into retirement. Read guide ](/remortgages) First Rung Now Independent UK mortgage education and broker matching. We don't sell mortgages — we help you understand them, then connect you with vetted advisers. 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