What Is a Mortgage in Principle and When Should You Get One?

If you’re buying your first home, you’ve probably come across the term Mortgage in Principle or Agreement in Principle. It sounds like an important step, but many first-time buyers aren’t entirely sure what it means or when they should get one. 

The good news is that a Mortgage in Principle is usually quick to arrange and can give you a much clearer idea of your buying position before you start viewing properties. 

In many cases, it’s one of the first steps you should take on your home-buying journey. 

What Is A Mortgage In Principle? 

A Mortgage in Principle (sometimes called an Agreement in Principle or Decision in Principle) is an indication from a lender of how much they may be prepared to lend, based on the information you provide. 

Although it isn’t a formal mortgage offer, it demonstrates that, subject to further checks, the lender is prepared to consider lending up to a certain amount. 

Think of it as a useful indication of your borrowing potential rather than a guarantee. 

Why Is A Mortgage In Principle Important? 

Obtaining a Mortgage in Principle gives you confidence before you begin searching for a property. 

It allows you to: 

  • Understand your likely borrowing budget. 
  • Focus your property search on homes within your price range. 
  • Demonstrate to estate agents that you’re a serious buyer. 
  • Put yourself in a stronger position when making an offer. 
  • Identify any affordability issues early in the process. 

Without one, it’s easy to spend time viewing properties that may ultimately fall outside your budget. 

Is A Mortgage In Principle Legally Binding? 

No. 

A Mortgage in Principle is not a commitment from either you or the lender. 

It simply indicates that, based on the information available at the time, the lender is willing to consider your application. 

Before issuing a formal mortgage offer, the lender will still assess your full application, carry out property valuation checks and complete any remaining underwriting. 

Does A Mortgage In Principle Guarantee You’ll Get A Mortgage? 

No. 

While it’s a positive first step, a Mortgage in Principle isn’t a guarantee that your mortgage application will be approved. 

The final decision will depend on several factors, including: 

  • Your full affordability assessment. 
  • Credit checks. 
  • The property you’re buying. 
  • The lender’s underwriting process. 
  • Any changes to your circumstances before you apply. 

For example, taking out new borrowing, changing jobs or experiencing a significant change in income could affect the final outcome. 

When Should You Get A Mortgage In Principle? 

Ideally, before you start viewing properties. 

Many first-time buyers wait until they’ve found their dream home before speaking to a mortgage adviser. However, obtaining a Mortgage in Principle first can save considerable time and reduce disappointment later. 

It also means that when the right property comes along, you’re ready to move quickly. 

In competitive markets, sellers and estate agents often look more favourably on buyers who already have a Mortgage in Principle in place. 

How Long Does A Mortgage In Principle Last? 

This varies between lenders, but many Mortgage in Principles remain valid for between 60 and 90 days. 

If it expires before you’ve found a property, it can often be renewed, provided your circumstances haven’t changed significantly. 

Does Getting A Mortgage In Principle Affect Your Credit Score? 

It depends on the lender. 

Some lenders carry out a soft credit search, which doesn’t affect your credit score. 

Others may carry out a hard credit search, which is recorded on your credit file. 

This is one reason why it’s often beneficial to speak with a mortgage adviser first. They can recommend lenders whose application process is most appropriate for your circumstances and help avoid unnecessary credit searches. 

Can You Get More Than One Mortgage In Principle? 

Yes. 

There’s nothing preventing you from obtaining more than one Mortgage in Principle. 

However, submitting multiple applications yourself can sometimes result in unnecessary credit searches, depending on the lenders involved. 

Working with a mortgage adviser can help identify the most suitable lender from the outset, reducing the need for multiple applications. 

What Information Is Used For A Mortgage In Principle? 

When assessing a Mortgage in Principle, lenders will typically consider: 

  • Your income. 
  • Your regular financial commitments. 
  • Your deposit. 
  • Your employment status. 
  • Your credit history. 
  • The amount you wish to borrow. 

The assessment is usually much quicker than a full mortgage application, making it an excellent way to understand your buying position early. 

What Happens After You’ve Found A Property? 

Once your offer has been accepted, you’ll move on to the full mortgage application. 

This is when the lender completes a more detailed assessment of both your finances and the property itself before deciding whether to issue a formal mortgage offer. 

A Mortgage in Principle simply helps you reach that stage with greater confidence. 

Is A Mortgage In Principle Free? 

In most cases, yes. 

Many lenders provide Mortgage in Principles without charge, although this can vary. 

Obtaining one early in your property search is usually a worthwhile step, as it provides greater certainty about your budget before you begin making offers. 

Why Expert Advice Matters 

Not all Mortgage in Principles are equal. 

Different lenders assess affordability differently, meaning the amount one lender is prepared to lend may be significantly higher or lower than another. 

Choosing the right lender from the outset can make a meaningful difference to your borrowing options. 

At Henry Dannell, we take the time to understand your circumstances before recommending the most appropriate lender. Whether you’re employed, self-employed, have variable income or are buying your very first home, we’ll help you secure a Mortgage in Principle that reflects your true borrowing potential and puts you in the strongest possible position when it’s time to make an offer. We can help you understand your true borrowing potential and identify opportunities that might otherwise be overlooked.


A mortgage is secured against your property. Your property may be repossessed if you do not keep up repayments on your mortgage or any other debt secured against it. Mortgage availability and lending criteria are subject to individual circumstances and status. 

Author:
Henry Dannell
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