--- title: "Limited Company Mortgage Calculator UK 2026 — SPV BTL | First Rung Now" description: "Limited company / ltd company mortgage calculator UK 2026: ICR stress test, max SPV BTL loan formula, worked examples and lender benchmarks." lang: en-GB json-ld: | [ { "@context": "https://schema.org", "@type": "Organization", "name": "First Rung Now", "url": "https://firstrungnow.com", "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": "Ltd Company Mortgage Calculator", "description": "Limited company / ltd company mortgage calculator UK 2026: ICR stress test, max SPV BTL loan formula, worked examples and lender benchmarks.", "author": { "@type": "Organization", "name": "First Rung Now" }, "publisher": { "@type": "Organization", "name": "First Rung Now", "url": "https://firstrungnow.com" }, "mainEntityOfPage": "https://firstrungnow.com/ltd-company-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": "Ltd Company Mortgage Calculator", "item": "https://firstrungnow.com/ltd-company-mortgage-calculator" } ] }, { "@context": "https://schema.org", "@type": "FAQPage", "mainEntity": [ { "@type": "Question", "name": "How does a limited company mortgage calculator work?", "acceptedAnswer": { "@type": "Answer", "text": "A limited company mortgage calculator estimates the maximum loan a UK SPV (Special Purpose Vehicle) can borrow on a buy-to-let property. It uses the rental income and the lender's Interest Coverage Ratio (ICR) stress test rather than personal income multiples. Typical inputs: rental income, property value, target LTV, ICR percentage (usually 125% for limited companies), and stressed interest rate (usually 5.5%)." } }, { "@type": "Question", "name": "What's the ICR for a limited company BTL mortgage?", "acceptedAnswer": { "@type": "Answer", "text": "Most UK SPV BTL lenders apply 125% ICR — meaning rent must cover at least 125% of mortgage interest at a stressed rate (typically 5.5% or the product pay-rate + 2%, whichever is higher). This is the same ICR applied to basic-rate personal landlords, and lower than the 145% stress applied to higher-rate personal landlords." } }, { "@type": "Question", "name": "How do I calculate the maximum SPV BTL loan?", "acceptedAnswer": { "@type": "Answer", "text": "Formula: Max loan = (Annual rent ÷ ICR percentage) ÷ stressed interest rate. Worked example: rent £14,400/year, ICR 125%, stressed rate 5.5% → (£14,400 ÷ 1.25) ÷ 0.055 = £209,454 maximum loan from an ICR perspective. The LTV cap (usually 75%) may bite first on lower-yield properties." } }, { "@type": "Question", "name": "Do directors need personal income for an SPV BTL mortgage?", "acceptedAnswer": { "@type": "Answer", "text": "Many lenders require minimum director personal income of £25,000–£30,000. A subset (Foundation Home Loans, Landbay) accept zero personal income for experienced landlords or trading SPVs with strong rental track record. Director income doesn't usually feed the affordability calculation directly — it's a qualifying criterion." } }, { "@type": "Question", "name": "Are limited company mortgage calculators accurate?", "acceptedAnswer": { "@type": "Answer", "text": "They give a reliable ballpark for maximum loan size based on ICR and LTV. Real underwriting also tests director credit, SPV age and structure, deposit source, property type and lender-specific overlays. Use a calculator to sense-check viability before applying; use a broker to confirm what each lender will actually offer." } }, { "@type": "Question", "name": "What other costs should I budget for on an SPV BTL?", "acceptedAnswer": { "@type": "Answer", "text": "Beyond the deposit and mortgage: SDLT including the 5% additional dwellings surcharge, legal fees (£1,500–£3,000), valuation fees (£300–£1,500 depending on property value), mortgage arrangement fee (1.5%–3% of loan), SPV setup and annual accountancy (£500–£1,500), licence fees for HMO/selective licensing areas." } } ] } ] --- [Skip to content](#main) [![First Rung Now](/assets/logo-mark-BqLOgqvj.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) [Speak to a Vetted Broker](/find-a-mortgage-broker) 1. [Home](/) 2. [Mortgage Calculators](/mortgage-calculators) 3. Ltd Company Mortgage Calculator UK Mortgage Guide # Limited Company Mortgage Calculator: Maximum SPV BTL Loan in 2026 A limited company mortgage calculator is the starting point for any UK landlord buying through a Special Purpose Vehicle (SPV). Unlike residential mortgages — which lean on income multiples — SPV buy-to-let lending is driven by Interest Coverage Ratio (ICR) stress tests on the rental income. This guide explains the calculator inputs, the formulas UK lenders actually use, the ICR thresholds in 2026, worked examples across property values and yields, and the lender-specific tweaks that change the answer. First Rung Now Editorial Updated 15 June 2026 7 min read On this page 1. [Key takeaways](#key-takeaways) 2. [The maths a limited company mortgage calculator uses](#the-maths-a-limited-company-mortgage-calculator-uses) 3. [Worked example 1: £150,000 flat at £900/month rent](#worked-example-1-150000-flat-at-900month-rent) 4. [Worked example 2: £250,000 house at £1,250/month rent](#worked-example-2-250000-house-at-1250month-rent) 5. [Worked example 3: £400,000 London flat at £1,500/month rent](#worked-example-3-400000-london-flat-at-1500month-rent) 6. [Speak with a vetted mortgage broker about limited company BTL mortgages and SPV affordability](#speak-with-a-vetted-mortgage-broker-about-limited-company-btl-mortgages-and-spv-affordability) 7. [Stressed rate variations by lender and product](#stressed-rate-variations-by-lender-and-product) 8. [ICR variations: where 125% becomes 140% or 160%](#icr-variations-where-125-becomes-140-or-160) 9. [What the calculator doesn't capture](#what-the-calculator-doesnt-capture) 10. [Putting it into action](#putting-it-into-action) 11. [Pros](#pros) 12. [Cons](#cons) 13. [Frequently asked questions](#frequently-asked-questions) 14. [How does a limited company mortgage calculator work?](#how-does-a-limited-company-mortgage-calculator-work) 15. [What's the ICR for a limited company BTL mortgage?](#whats-the-icr-for-a-limited-company-btl-mortgage) 16. [How do I calculate the maximum SPV BTL loan?](#how-do-i-calculate-the-maximum-spv-btl-loan) 17. [Do directors need personal income for an SPV BTL mortgage?](#do-directors-need-personal-income-for-an-spv-btl-mortgage) 18. [Are limited company mortgage calculators accurate?](#are-limited-company-mortgage-calculators-accurate) 19. [What other costs should I budget for on an SPV BTL?](#what-other-costs-should-i-budget-for-on-an-spv-btl) 20. [Related guides](#related-guides) 21. [Limited Company BTL Mortgage Rates](#limited-company-btl-mortgage-rates) 22. [BTL Interest-Only Calculator](#btl-interest-only-calculator) 23. [HMO Mortgage Calculator](#hmo-mortgage-calculator) ### 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) - [RIO mortgage calculator Estimate maximum RIO loan and lifetime interest using property value, LTV and rate. ](/retirement-interest-only-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) 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 - SPV BTL borrowing is driven by ICR — not income multiples. - Standard limited-company ICR: 125% at 5.5% stressed rate. - Formula: Max loan = (Annual rent ÷ 1.25) ÷ 0.055. - LTV cap (75% typical) bites first on low-yield properties. - Worked examples below cover £150k, £250k, £400k properties. ## The maths a limited company mortgage calculator uses Want a vetted broker to help with The maths a limited company mortgage calculator uses? 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) Every SPV BTL lender uses essentially the same ICR formula: **Maximum loan = (Annual rent ÷ ICR percentage) ÷ Stressed interest rate** Then check against the LTV cap. Take the lower of the two. ## Worked example 1: £150,000 flat at £900/month rent 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 Worked example 1: £150,000 flat at £900/month rent? 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) - Annual rent: £10,800 - ICR at 125%: £10,800 ÷ 1.25 = £8,640 (maximum stressed annual interest) - Stressed rate 5.5%: £8,640 ÷ 0.055 = **£157,090 max loan by ICR** - 75% LTV cap: 75% × £150,000 = **£112,500 max loan by LTV** - **Maximum loan: £112,500** (LTV bites first — typical for higher-yield property) - Deposit needed: £37,500 + SDLT and fees ## Worked example 2: £250,000 house at £1,250/month rent Want a vetted broker to help with Worked example 2: £250,000 house at £1,250/month rent? 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) - Annual rent: £15,000 - ICR at 125%: £15,000 ÷ 1.25 = £12,000 - Stressed rate 5.5%: £12,000 ÷ 0.055 = **£218,182 max loan by ICR** - 75% LTV cap: **£187,500** - **Maximum loan: £187,500** (LTV still bites) ## Worked example 3: £400,000 London flat at £1,500/month rent Calculators · keep reading - [RIO mortgage calculator Estimate maximum RIO loan and lifetime interest using property value, LTV and rate. ](/retirement-interest-only-mortgage-calculator) - [JBSP mortgage calculator Combined-income affordability when a parent supports the mortgage but stays off the title. ](/jbsp-mortgage-calculator) Browse the full hub: [Mortgage calculators](/mortgage-calculators) Want a vetted broker to help with Worked example 3: £400,000 London flat at £1,500/month rent? 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) - Annual rent: £18,000 - ICR at 125%: £18,000 ÷ 1.25 = £14,400 - Stressed rate 5.5%: £14,400 ÷ 0.055 = **£261,818 max loan by ICR** - 75% LTV cap: **£300,000** - **Maximum loan: £261,818** (ICR bites — typical for low-yield London property) - Effective LTV: 65% — buyer needs £138,182 deposit, not the £100,000 they planned Vetted UK Broker Match ### Speak with a vetted mortgage broker about limited company BTL mortgages and SPV affordability 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) ## Stressed rate variations by lender and product Want a vetted broker to help with Stressed rate variations by lender and product? 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) - **5-year fixed products:** Most lenders stress at the product pay-rate (e.g. 5.6%) rather than 5.5%. This often unlocks larger loans for landlords prepared to fix for 5 years. - **2-year fixed and trackers:** Stressed at 5.5% or product-rate + 2%, whichever is higher. - **Top-slicing lenders (Landbay, Paragon, Foundation):** Allow personal income to supplement ICR if rental falls short. Useful on low-yield property. ## ICR variations: where 125% becomes 140% or 160% Calculators · keep reading - [Mortgage buyout calculator Work out equity split, affordability and SDLT on a divorce or separation buyout. ](/mortgage-buyout-calculator-uk) - [Business property mortgage calculator Size a UK commercial mortgage using LTV, DSCR and company accounts. ](/business-property-mortgage-calculator) Browse the full hub: [Mortgage calculators](/mortgage-calculators) Want a vetted broker to help with ICR variations: where 125% becomes 140% or 160%? 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) - **HMO and MUFB:** typically 140%–160% ICR. - **Expat/non-resident SPV directors:** typically 140% ICR. - **Holiday let SPV:** typically 145% on lower of 30%-occupancy or AST market rent. ## What the calculator doesn't capture Want a vetted broker to help with What the calculator doesn't capture? 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) 1. **Director credit footprint.** Adverse credit reduces lender choice even if ICR maths passes. 2. **SPV age and structure.** Trading companies and multi-director SPVs have narrower lender pools. 3. **Property type and tenant covenant.** Studios, ex-LA flats, high-rise and HMO often face additional overlays. 4. **Portfolio stress.** If you already own 4+ BTL properties, the lender may apply a portfolio aggregate ICR. 5. **Director income minimums.** Most lenders require £25k–£30k personal income — calculator output is moot if you fail this gate. ## Putting it into action Calculators · keep reading - [Bad credit mortgage checker Place your situation on the lender severity scale and see what a specialist will accept. ](/bad-credit-mortgage-checker) - [Bad credit bridging loan Short-term asset-backed lending when adverse credit closes high-street doors. ](/bad-credit-bridging-loan) Browse the full hub: [Mortgage calculators](/mortgage-calculators) Want a vetted broker to help with Putting it into action? 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) 1. Plug your rental income and property value into the formula above. 2. Take the lower of (ICR-derived loan, LTV-derived loan). 3. Subtract from property value to get minimum cash deposit. 4. Add ~10%–12% for SDLT (incl. 5% surcharge), legal, valuation and arrangement fees. 5. Confirm with a broker which 3–5 lenders fit your specific case. ### Pros - Simple, transparent formula based on rent and stressed rate. - Lets you sense-check viability before committing time to applications. - Helps you identify whether ICR or LTV is the binding constraint. - Same maths works across SPV BTL, HMO and MUFB with different ICR. - Quickly shows when top-slicing or 5-year fixes will help. ### Cons - Doesn't capture lender-specific overlays. - Ignores director credit, SPV age and structure issues. - Stressed rate assumption may differ from what the lender actually uses. - HMO/holiday-let cases need higher ICR not built into vanilla calculators. - Portfolio aggregate stress (4+ properties) needs lender-specific modelling. ## Frequently asked questions ### How does a limited company mortgage calculator work? ### What's the ICR for a limited company BTL mortgage? ### How do I calculate the maximum SPV BTL loan? ### Do directors need personal income for an SPV BTL mortgage? ### Are limited company mortgage calculators accurate? ### What other costs should I budget for on an SPV BTL? ## Related guides [ ### Limited Company BTL Mortgage Rates Lender-by-lender SPV BTL pricing in 2026. Read guide ](/limited-company-btl-mortgage-rates)[ ### BTL Interest-Only Calculator ICR stress tests across personal-name and SPV. Read guide ](/buy-to-let-interest-only-calculator)[ ### HMO Mortgage Calculator Same ICR maths with higher rents and stress. Read guide ](/hmo-mortgage-calculator) 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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