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Writer's pictureKevin Hepplewhite

What is a Mortgage in Principle?

A Mortgage in Principle (MIP) which can also be know as an Agreement in Principle (AIP) or Decision in Principle (DIP) are all the same thing, it is a provisional lending offer from a mortgage lender.

The AIP/DIP will state the amount the mortgage lender is willing to lend you based on an initial assessment of your financial situation. It’s not a full mortgage offer, but it indicates that the lender is willing to consider lending to you, subject to a full application and further checks.


mortgage broker discussing mortgage in principle with couple
mortgage advice

Key here is that any information that is input at this point is as accurate as possible.


Obtaining an AIP/DIP typically involves the following:


  • Lender Financial Checks. A mortgage lender will review your basic details including income and expenditure along with accessing your current and previous credit history

  • Credit check. They will check your credit history either though a "soft" or "hard" credit check (often termed as a footprint). Soft checks don’t affect your credit score, while hard checks might. Most mainstream lenders do a `soft footprint`

  • Mortgage Loan Amount. Based on the information provided, the lender will give you an indicative estimate of how much you could borrow from them. This is often a maximum amount based on your information provided

  • Budgeting. This potential loan amount, along with any deposit you have, gives you a great idea on the price range of a potential property purchase

  • Non-Binding. Crucially here is that the agreement is not legally binding. It doesn’t guarantee you’ll be approved for a mortgage, as the lender will need to carry out a far more thorough assessment during the full application process

  • Time Limited. An AIP/DIP is typically valid for a few months (e.g., up to 90 days). After this period, you may need to reapply if you haven’t yet found a property or proceeded with a full mortgage application. Or indeed if circumstances have changed

  • Estate Agents. Most estate agents will ask for a copy of an AIP/DIP when making an offer on a property to prove that you can potentially afford to purchase it


Just Remember though. While an AIP/DIP is extremely useful, it’s only the first initial step. A full detailed mortgage application will need to be completed and a valuation of the property you wish to buy, before a successful mortgage loan is approved. 


If you would like to speak to a mortgage broker about obtaining an AIP/DIP contact us at Holistic Mortgages on advice@holisticmortgages.co.uk or 01642 130730.


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