Cyborg Finance

Browse our buy-to-let mortgage guides: how rental income is assessed, stress testing, deposits and loan-to-value, HMOs, holiday lets and limited company structures - for landlords from a first investment to a full portfolio.

Buy-to-Let Guides

Guides for Personal Name Buy-to-Let

Can You Have More Than One Buy-to-Let Mortgage? A Landlord's Guide to Scaling Up

A practical guide to holding multiple mortgages in the UK, including residential, buy-to-let, holiday let and second-charge scenarios, what lenders typically look at and how to plan for affordability and risk.

How to get a buy-to-let mortgage

A practical guide to securing a buy-to-let mortgage as a first-time property investor, including how lenders assess applications and how to prepare your finances and documents.

Buy-to-let mortgage stress tests: ICR and affordability

Learn what buy-to-let mortgage stress tests are, how lenders assess affordability using rental income and interest coverage, and practical ways landlords can prepare their application.

Green Buy-to-Let Mortgages: A Landlord's Guide to Financing Energy-Efficient Property

An overview of green buy-to-let mortgages, how EPC requirements work, and why energy-efficient homes can support landlord profitability and tenant demand.

Are you a BTL mortgage prisoner?

Understand what a “BTL mortgage prisoner” is, why it can happen, and the practical options landlords may have when refinancing becomes harder.

Applying for a Buy-to-Let Mortgage Online: A Landlord's Guide to the Process

How an online Buy-to-Let application gathers the information lenders need, what you can expect from the process, and how it helps shape the next steps.

Is there an age limit for a buy-to-let mortgage?

Learn how mortgage age limits work in the UK, what lenders mean by “end of term” caps, and the options available for older borrowers—plus what’s different with buy-to-let.

First-Time Buyer Landlord Buy-to-Let Mortgages: A Guide to Getting Your First Rental

A practical guide for first-time buyers purchasing their first property as a buy-to-let, including how lenders assess rental income, deposits and property suitability.

Getting a Buy-to-Let Mortgage After Bankruptcy: A Landlord's Guide to Approval

Understand how bankruptcy affects buy-to-let mortgage applications, what lenders typically look for, and how to prepare your finances and paperwork to improve your chances.

HMO Buy-to-Let Guides

HMO buy-to-let refurbishment mortgages: a guide to funding conversion works

A specialist guide to HMO refurbishment mortgages for buy-to-let investors: what they're for, how the funding works, who they suit, and how the application is assessed step by step.

Fixed or tracker HMO buy-to-let mortgage: a guide to choosing what fits your plan

A practical comparison of fixed-rate and tracker-rate HMO mortgages for buy-to-let landlords, covering how each works, the risks and trade-offs, and how to match the mortgage type to your investment plan.

Changing a standard buy-to-let to an HMO buy-to-let mortgage: a practical guide

A mortgage-focused guide to converting an existing Buy to Let into an HMO mortgage, including the staged finance approach, lender requirements, HMO licensing, valuations and practical timing considerations.

How HMO buy-to-let mortgages work: a complete guide for landlords

A complete, evergreen guide to HMO buy-to-let mortgages: what an HMO is, how HMO finance differs from standard buy-to-let, what lenders check (licensing, fire safety, room sizes, stress tests, deposit and LTV), ownership and tenancy structures, the application process, and practical planning for 3–5 room HMOs.

A landlord's guide to HMO buy-to-let licence costs, common issues and saving money

A practical guide to HMO licence costs, common compliance issues and saving money for UK buy-to-let landlords, covering council fees, renewals, discounts, compliance costs, penalties and budgeting.

Discount-rate HMO buy-to-let mortgages: a guide to what happens when the deal ends

A practical, educational guide to discount rate HMO mortgages, how the discount works, what happens when it ends, how SVR tracking affects repayments, and when this rate type can fit an HMO investment strategy.

Fixed-rate HMO buy-to-let mortgages: a landlord's guide to locking in your rate

A specialist, landlord-focused guide to fixed rate HMO buy-to-let mortgages, how fixed periods work, what drives fixed rates, early repayment charges, and when a fixed deal can suit HMO property investment.

C4, Sui Generis and Section 257: a guide to HMO buy-to-let property types

An educational guide to the main types of HMO property in the UK, C4, Sui Generis, Section 257, purpose-built HMOs, bedsits and mixed-use, plus how each type can affect planning, licensing and mortgage finance.

Funding HMO refurbishments with bridging finance

A practical guide for HMO investors on how bridging finance can support renovation and refurbishment projects, what lenders typically expect, how to estimate costs, and how to plan an effective exit into long-term funding.

Limited Company Buy-to-Let Guides

Trading Company Buy-to-Let Mortgages

What a trading company is, why buy-to-let lenders are more cautious about them than SPVs, how SIC codes affect lender perception, deposit routes via intercompany loans, and which lenders do or don't accept trading companies.

LTD Company BTL SIC Codes Requirements

Learn what SIC codes are, which ones are commonly used for buy-to-let property investment companies, and why lenders look closely at the company’s stated business activity.

Stamp Duty (SDLT) for LTD Company Landlords

A practical guide to how Stamp Duty Land Tax works when a limited company buys property for rental, including the 5% surcharge, current SDLT bands, and planning points.

Company Buy-to-Let Guide: how to secure a limited company buy-to-let mortgage

A practical guide for landlords using an SPV or LTD company structure to buy-to-let, covering the key steps, documents and common pitfalls lenders expect to see.

Buy-to-let with defaults: getting a mortgage when your credit history isn't perfect

A practical overview of how buy-to-let lenders assess applicants with defaults, what can improve your chances, and the key factors that influence approval.

Remortgaging a personal buy-to-let into an SPV Company

Understand how moving an existing personal buy-to-let into a Limited Company or SPV typically works, why it’s often treated as a purchase rather than a remortgage, and the key mortgage, deposit, rental coverage and tax considerations.

Company Buy-to-Let Guide: how to finance commercial property through your limited company

A practical guide to how commercial buy-to-let mortgages work for limited companies, including property types, lending criteria, deposits and security, repayment options, and the key differences versus residential buy-to-let.

Company Buy-to-Let Remortgage Guide: remortgaging a property already held in your SPV

A practical guide to remortgaging a buy-to-let property held in a limited company or SPV, covering common reasons, lender expectations, costs to plan for and key documents.

How do LTD/SPV buy-to-let mortgages work?

A comprehensive guide to limited company (LTD/SPV) buy-to-let—what it is, how it works, why landlords are moving to company structures in 2026, how to set up an SPV that lenders will accept, how applications are assessed, and whether it's the right structure for your portfolio.


Practical, landlord-focused guides on every part of buy-to-let borrowing: how rental income is assessed, stress testing and affordability, deposits and loan-to-value, repayment structures, and the specialist routes such as HMOs, holiday lets and limited companies.

Our guides are organised into the four collections above. Each section shows the most recent guides.

How lenders assess rental income and affordability, stress testing, deposits, repayment choices, portfolio borrowing and specialist landlord situations.

Licensing and planning, multi-let rental assessment, lender criteria, and funding conversions or refurbishments.

Buying or refinancing through a limited company: how lenders assess company applications, director income, tax and stamp duty considerations.

How short-term rental income is assessed, lender criteria, owner-use rules, Airbnb and short-term lets, and switching from a standard buy-to-let.

Get in touch

We are your online mortgage broker, offering you the convenience of applying for a mortgage online. However, we understand that sometimes you may prefer to speak with a human - phone, email or in person.

Phone number
01133 205 902
Postal address
31 Bradford Chamber Business Park,
New Lane, Bradford, BD4 8BX

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FCA Authorised

We are authorised and regulated by the Financial Conduct Authority (No. 919921). The Financial Conduct Authority does not regulate most Buy to Let mortgages.

Think carefully before securing other debts against your home. Your home may be repossessed if you do not keep up repayments on your mortgage.

Our initial consultation is free. If you choose to proceed, we’ll explain any broker fees upfront before you commit.

British Company

Cyborg Finance Limited is registered in England and Wales (No. 12131863) at Bradford Chamber, New Lane, Bradford, BD4 8BX.