What Is A Mortgage Promise?

Home What Is A Mortgage Promise?
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Mortgages Sunny Avenue
12 Jun 2023

If you're a first time buyer, looking at properties without knowing what is achievable for you. The last thing you want is to fall in love with a property that you can't afford to buy. That's where the mortgage promise comes in to play.

In this insight, we will cover all you need to know about how the first stage of the mortgage process works as we tackle the question, what is a mortgage promise?


Key Takeaways

  • The mortgage promise tells you how much you can borrow for a mortgage.
  • Most lenders run a soft credit check to confirm you are eligible for a mortgage.
  • It uses to income to confirm what house price range you can consider.
  • It works as a guideline, not a guarantee.

What Is A Mortgage Promise?

A Mortgage promise is a document that confirms how much you can borrow for a house. Lenders assess your affordability and agree to an amount they would be willing to lend. The Mortgage promise is also known as a Mortgage in Principle, a Mortgage Decision in Principle, or an Agreement in Principle. 

It is simply your affordable loan amount. It's used to consider what properties are affordable for you. When you are ready, considering the loan amount and your deposit, you can put offers in for houses you like.

The mortgage promise includes your name, the lender's logo, and the loan amount available.

Lenders have different information on their mortgage promises. For example, some include the maximum term available. That is determined by your age and retirement age.

Does a Mortgage in Principle mean you will be accepted? No. The mortgage promise is not a guarantee. It serves as a guideline to understand realistic house options. Your income and credit score will be checked to provide assurance, but the bank can still reject your application later. The full mortgage application process is the only way to obtain a guarantee.

If at this stage you find you cannot borrow as much as you thought, you may want to enquire about the possibility of a Joint Borrower Sole Proprietor Mortgage.

Read our insight: Buying a House for more information on the step by step house process.

Are You Looking To Find Out How Much You Can Borrow?

If you're thinking about your mortgage options ahead of buying your first home, moving home, or even to borrow more?
We can help you find a mortgage specialist to offer you the very best advice. Complete our Sunny Fact Find form to provide us a bit more detail about your circumstances and we'll find the best-suited adviser for your needs.
Your appointed adviser will contact you to discuss how they can help, you decide how to proceed.

How Do You Get a Mortgage Promise?

The only way to obtain a mortgage promise is to speak directly to the lenders or your mortgage adviser.

You may need to book an appointment, or can try to apply online. You will be asked a series of questions about your income and expenditure. At the end, a soft credit score check will be run and your decision amount provided.

Each lender has a different affordability assessment. That means the maximum loan amount each lender will vary. Sometimes, one lender may not be able to lend as much as another. For that reason, it is a good idea to seek advice from a whole of market mortgage adviser. The whole of market mortgage adviser has access to a panel of lenders and can obtain a decision from many lenders with just one application. If you tried to arrange this yourself, you would need to individually apply for a mortgage promise with each lender. That will take too much time.

What Do You Need For A Mortgage Promise?

During this process, the lender is going to ask you questions about your income and expenditure. Calculating the amount you can borrow is not going as simple as stating your income.

Lenders have rules to follow. Ways to assess your income, which may differ from how you assess your own income. For example, a lender may not take into account certain types of income, or they may only take into account a percentage of income. Income such as Bonuses and overtime may be calculated to only include 60%, where income from expenses will be considered non-allowable income.

The lender may also assess income using your last month's payslip for basic income, or your last three months if you have any fluctuations. An average will then be calculated. As the agreement in principle is not the finalised loan amount, but simply a guideline for you, if your income changes to a lower amount when it is time to apply for the full mortgage, you may be assessed to only be able to afford a lesser amount.

For these reasons, it is advisable at this point to provide proof of your income. Here is what's required:

  • If you're self-employed, you should provide 2/3 years' worth of accounts or SA302s.
  • If employed, you should provide 3 months' worth of payslips.
  • For any additional income you have, such as rental income, you will be required to provide evidence via bank statements or a tennacy agreement. 
Other information to provide:
  • Proof of address
  • Past 3 years address history
  • Name and Date of birth of applicants
  • Expenditure details such as student Loans, bank loans, credit cards, store cards, car finance, hire-purchase or any other finance agreements.

How long does a Mortgage Promise last?

There will be an expiry date provided on the agreement in principle, this is generally 3 months after the date it is produced. The expiry date is required so that the lender can re-assess your circumstances, ensuring your loan amount is still affordable.

However, if there are no changes to your income. It will be likely that the loan amount will show no change. If the loan amount does change, this may be due to changes in the lender's policy.

After your Agreement in Principle expires, it does not mean you need to stop looking at properties. To refresh the AIP, all you need to do is make a quick call to your mortgage adviser and they will reassess any changes, sending you an extended document.

How Much Does A Mortgage Promise Cost?

You will not be charged to apply for an AIP from the lender. Some Mortgage advisers may charge you a fee for their time. If they do, it will make this clear to you before any meetings.

Speaking to many lenders may cost you your time. Some lenders still insist on clients meeting with a qualified mortgage adviser to provide an AIP. That could involve waiting for availability, or needing to book a few different appointments.

Can You Get A Mortgage Promise Online?

It's possible to obtain an AIP online. This will be generated on the same day and sent via e-mail to you. If you use online services you need to be aware that the AIP provided to you will be based on the information you have input. Should you make any error with inputting data it could lead to an incorrect AIP and possible disappointment.

It is possible to arrange AIPs over the phone with an independent Mortgage adviser and still have these sent, via e-mail, on the same day.

If you have complicated income types, It is a good idea to speak with a Mortgage adviser. They will be able to input your income figures correctly, which should avoid any disappointment later down the line that you may face doing the agreement alone.

Do You Need A Credit Score Check for A Mortgage Promise?

When you apply for a mortgage promise, you will need to have a credit scoring check completed. This is either be a soft, or hard credit check.

Soft credit checks look into your credit report, without leaving a mark to show you are applying for credit.

A hard credit check will leave a mark on your profile to indicate that you are applying for credit. Most lenders only apply a credit mark at the full application stage, however, if you are going to be reviewing your circumstances with many lenders it is worth asking what type of credit checks they will be running.

If you have too many credit checks on your profile it may look like you are looking for lots of credit and that can put lenders off.

Mortgage advisers who use a panel of lenders will only run one credit check as often their lending systems have agreements with all lenders on their panel to use the same checks to provide affordability, and agreement in principle results.

Can You Get A Mortgage Promise for a Buy to Let?

It is possible to request a mortgage promise for a Buy to Let. However, as the lending assessment differs from residential mortgages, the agreement in principle may be less accurate.

It will confirm your credit score is acceptable and provide details of the maximum loan term available. However, as the maximum mortgage loan amount is based on the rental income that can be achieved from a property, more often it will be based on estimates, rather than hard evidence. This could lead to disappointment at the full application stage if the rental income achieved or valued is not as high as expected.

Are You Looking To Find Out How Much You Can Borrow?

If you're thinking about your mortgage options ahead of buying your first home, moving home, or even to borrow more?
We can help you find a mortgage specialist to offer you the very best advice. Complete our Sunny Fact Find form to provide us a bit more detail about your circumstances and we'll find the best-suited adviser for your needs.
Your appointed adviser will contact you to discuss how they can help, you decide how to proceed.

What To Be Aware of With a Mortgage Promise:

There are a few points to be cautious about when relying on a mortgage agreement in principle:

Change in circumstances

Your agreement is based on the information provided on the day it is agreed upon. Despite the AIP lasting for three months, should your circumstances change, the loan amount can change also.

No guarantees

The AIP is not a guarantee. The lender can pull from the market, or specifically change the decision for you based on policy changes.

Average income calculations

If your income calculated was using an average, when you find a property if your average income has reduced it may impact your ability to borrow as much as agreed in the AIP.

A full credit check has not yet been completed

At the full application stage, a new credit check will be completed. If your credit score has changed or you have taken new credit, it will impact the amount you can borrow.

Incorrectly inputting information

The assessment is based on the income figures you have provided, if you do not have help from a Mortgage adviser, you may input incorrect figures and that will invalidate the agreement in principle.

Interest rates may not be the best with the highest lender

The lender who offers the highest Agreement in principle amount may not have the best mortgage for your needs. You will still be able to change lenders, if required, at the point of Full Application.

Can You Make An Offer Without A Mortgage Promise?

It is possible to make an offer without an agreement in principle. However, this is not advisable as it may lead to disappointment down the line. For more information on viewing properties without a mortgage promise, read our insight: Can you view a house without a mortgage promise?

Due to a competitive market, vendor agents are more frequently asking for an agreement in principle when accepting offers on a property. Obtaining a Mortgage in principle shows you are serious about buying and have had relevant checks completed.

What does a Mortgage Promise look like?

what is a mortgage promise

An example of an online Mortgage agreement in principle provided by a high street bank. These AIP's can also be provided by a Mortgage broker.

Getting Started With a Mortgage Promise

If you are looking to arrange a mortgage promise, you can use the Sunny Avenue Fact Find to get started. The answers you provide help us to find the most suitable adviser. Your adviser then contacts you to discuss how they can help. You decide how to proceed.

ABOUT THIS AUTHOR - STUART CRISPE

Stuart is an expert in Property, Money, Banking & Finance, having worked in retail and investment banking for 10+ years before founding Sunny Avenue. Stuart has spent his career studying finance. He holds qualifications in financial studies, mortgage advice & practice, banking operations, dealing & financial markets, derivatives, securities & investments.

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