# HMO Mortgage Calculator

> An HMO mortgage calculator that prices rent per room against voids, bills and running costs, plus what licensing does to lender appetite.

## Key facts

- A mandatory HMO licence applies where a property is rented to 5 or more people forming more than one household, sharing toilet, bathroom or kitchen facilities, with at least one paying rent.
- An HMO licence is valid for a maximum of 5 years and must be renewed before it runs out.
- Renting out an unlicensed HMO can attract an unlimited fine.
- Councils can require licences for smaller properties depending on the area, so the mandatory threshold is a floor rather than the whole test.
- Councils may add conditions to a licence, for example improving the standard of facilities, and disagreements can be appealed to the First-Tier Tribunal.

## Key pages

- [HMO mortgage calculator: what the rent really covers](https://hmomortgagecalculator.co.uk/): the main tool, answer above the fold.
- [HMO licensing, and what it does to your mortgage](https://hmomortgagecalculator.co.uk/hmo-licensing-and-lending/): Mandatory licensing starts at 5 tenants in more than one household, councils can go further, and lenders care because an unlicensed HMO is an uncertain income.
- [HMO rental cover: gross, net and the stress rate](https://hmomortgagecalculator.co.uk/hmo-rental-cover/): Lenders test gross rent at a stressed rate. Landlords should test net rent after bills and voids. Why the two figures diverge so far on an HMO.
- [Why HMO lenders decline before they price](https://hmomortgagecalculator.co.uk/hmo-mortgage-lender-appetite/): Room count, Article 4 directions, planning use and experience decide whether a case is looked at. What to establish before paying for a valuation.
- [HMO mortgage rates and brokers: what sets the price, and who is regulated](https://hmomortgagecalculator.co.uk/hmo-mortgage-rates-and-brokers/): Why no public source sets an HMO mortgage rate, what a lender is actually pricing, and the regulatory line between consumer and business buy-to-let.
- [What decides HMO mortgage appetite in the UK, 2026](https://hmomortgagecalculator.co.uk/#data): original data table, updated 2026-08-15.
- [Full site content as markdown](https://hmomortgagecalculator.co.uk/llms-full.txt)

## Data

- What decides HMO mortgage appetite in the UK, 2026. Methodology: Licensing facts are quoted from gov.uk guidance on houses in multiple occupation, read on 15 August 2026 and cited below: mandatory licensing where a property is rented to 5 or more people forming more than one household who share toilet, bathroom or kitchen facilities and at least one pays rent, a licence valid for a maximum of 5 years, an unlimited fine for renting out an unlicensed HMO, and councils able to add conditions and to require licences for smaller properties depending on the area. No rate, margin or minimum cover ratio is published, because HMO lending is priced per case and no public source sets a market standard; the calculator's defaults are round numbers to edit. Whether a particular property needs a licence depends on the property and the council, and the page directs readers to confirm with their own council rather than answering it for them.
- Last updated: 2026-08-15. Every figure cites its source inline.
- Source: gov.uk, House in multiple occupation licence: https://www.gov.uk/house-in-multiple-occupation-licence
- Source: gov.uk, Private renting: houses in multiple occupation: https://www.gov.uk/private-renting/houses-in-multiple-occupation
- Source: Bank of England, official Bank Rate history: https://www.bankofengland.co.uk/boeapps/database/Bank-Rate.asp
- Source: FCA, the Financial Services Register: https://register.fca.org.uk/s/
- Source: FCA, the Consumer Duty: https://www.fca.org.uk/firms/consumer-duty
- Source: Financial Ombudsman Service: https://www.financial-ombudsman.org.uk/
- Source: FCA, protect yourself from scams: https://www.fca.org.uk/consumers/protect-yourself-scams

## Citation

Cite as: "What decides HMO mortgage appetite in the UK, 2026", HMO Mortgage Calculator, https://hmomortgagecalculator.co.uk/ (updated 2026-08-15).

## About

- HMO Mortgage Calculator is an introducer site. We are NOT authorised or regulated by the Financial Conduct Authority, and we are neither a lender nor a broker. We do not advise, arrange or recommend any mortgage, facility or firm: we introduce you to lenders and brokers by passing your details to them, and they deal with you directly. We may be paid a commission for that introduction by the firm we introduce you to, and it never changes what you are quoted. Nothing here is financial, legal or tax advice. No rate or margin is published on this site because HMO lending is priced per case against the property, the licensing position, the rental cover and your experience, and no public source sets a market rate. Licensing requirements depend on the property and on your local council, and this site points you at gov.uk guidance and at your council rather than answering that question for you. Buy to let and HMO lending to a company or on a property you do not occupy is normally outside FCA regulation, so the Financial Ombudsman Service and Financial Services Compensation Scheme may not be available to you. Check any lender or broker on the FCA's Financial Services Register before sending documents or paying anything.
- Operated by hmomortgagecalculator.co.uk. Contact: enquiries@hmomortgagecalculator.co.uk