A mortgage in principle is a quick way to find out how much you could borrow before you start house-hunting. This guide explains what it is, why it matters, and how to get one. It’s based on current UK mortgage processes and applies to first-time buyers and home movers.
Oct 6, 2025
A mortgage in principle (also called an Agreement in Principle or Decision in Principle) is a statement from a lender showing how much they might be willing to lend you.
It isn’t a full mortgage offer, but it’s a useful starting point when you’re figuring out your budget. Estate agents also take buyers more seriously when they already have a mortgage in principle.
Getting a mortgage in principle early in your search has clear benefits:
Before you get a mortgage in principle, make sure you’ve gathered some basic information:
Lenders use this information to run a soft credit check and estimate how much they may lend.
You’ve got three main ways to do it:
Most banks and building societies let you apply online in under 15 minutes. You’ll get a figure showing the maximum they may lend, subject to checks later.
A broker like MBNM can check your situation against multiple lenders at once. This is especially useful if your income isn’t straightforward or you want to avoid unnecessary credit checks.
Your current bank might offer a mortgage in principle quickly since they already hold your financial data. It’s often fast, but you may not get the best deal if you only look there.
Once you have your mortgage in principle, you can:
Just remember, a mortgage in principle isn’t binding. The lender will do full checks when you apply for the actual mortgage.
Most mortgage in principle certificates are valid for 30 to 90 days. If yours expires before you find a property, you can usually renew it easily with updated details.
If your financial situation changes in the meantime (e.g. new job, more debt), the amount offered may change too.
At Mortgage Brokers Near Me (MBNM), we help buyers secure mortgage in principles quickly and with minimal fuss. Our team looks at your situation, matches you with suitable lenders, and guides you through what to expect next.
Whether you’re buying your first home or moving up the ladder, we’ll help you set a clear budget and move confidently. Get in touch with us here.
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If you want to borrow £500,000, many lenders start with income multiples (often around 4x to 4.5x), then run a full affordability check based on your outgoings and deposit. As a rough guide, a household income of about £111,000 to £125,000 is often needed for a £500,000 loan, but some applicants may be able to borrow more depending on the lender, the application, and how strong the overall case is.
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Your Home (or property) may be repossessed if you do not keep up repayments on your mortgage or any other debts secured on it.
Mortgage Brokers Near Me LTD is an Appointed Representative of The Right Mortgage LTD which is authorised and regulated by the Financial Conduct Authority.
The guidance and/or information contained within this website is subject to the UK regulatory regime and is therefore targeted at consumers based in the UK. The Financial Conduct Authority does not regulate Will Writing and some forms of Trusts and Buy to Lets. A fee may be charged for mortgage advice. The exact amount will depend on your circumstances.
Mortgage Brokers Near Me LTD are registered in England and Wales with company number 15189091.
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