When you’re preparing to buy a house, getting a Mortgage in Principle (MIP) is one of the first and most crucial steps in the process. It’s often one of the first questions estate agents will ask — and having it ready can make a significant difference when securing your dream property. Obtaining a Mortgage in Principle is the first step in the home-buying process, providing an estimate of how much you can afford to borrow and increasing your credibility with sellers and agents.
In this blog, we’ll dive deep into why Mortgage in Principle matters and how it can impact your home-buying journey in Preston.
1. What is a Mortgage in Principle?
Ever asked yourself What House Can I Afford? A Mortgage in Principle (MIP), also known as an Agreement in Principle (AIP), is a document from a lender that gives you an estimate of how much they’re willing to lend you based on your income, credit file, and other factors. It helps you get an agreement and find out how much you might be able to borrow. While it’s not a formal mortgage offer, it is an essential step in the home-buying process.
An MIP helps you find out how much you might be able to borrow. It provides an early indication of your borrowing capacity, helping you plan your home search effectively. By understanding your financial limits, you can focus on properties that are realistically within your budget, making the property search process more efficient. Additionally, having an MIP can enhance your credibility with sellers, demonstrating that you are a serious buyer who has already taken steps to secure financing. This can be particularly advantageous in competitive markets, where sellers might prioritize offers from buyers with a mortgage in principle in place. Furthermore, obtaining an MIP allows you to identify any potential issues with your credit rating or financial situation early on, giving you the opportunity to address them before proceeding with a full mortgage application.
Different Names for a Mortgage in Principle
A mortgage in principle is also known by several other names, including:
- Agreement in Principle (AIP)
- Decision in Principle (DIP)
- Mortgage Promise
- Mortgage in Principle (MIP)
These terms are often used interchangeably, but they all refer to the same document. It's crucial to understand that these terms represent an initial agreement that outlines the amount a lender might be willing to offer you based on preliminary checks. This document is an essential part of the home-buying process as it helps streamline your home search by providing a clear indication of your borrowing capacity. Moreover, having an MIP can enhance your credibility with sellers, showcasing you as a serious buyer who has already taken steps to secure financing. This can be particularly advantageous in competitive markets, where sellers might prioritize offers from buyers with a mortgage in principle in place. By obtaining an MIP, you can also identify any potential issues with your credit score or financial situation early on, giving you the opportunity to address them before proceeding with a full mortgage application. Understanding the different names and their implications can help you navigate the mortgage process more effectively, ensuring you make informed decisions and avoid potential pitfalls.

2. The Benefits of a Mortgage in Principle
Streamlined Property Search
One of the most important reasons for securing an MIP is that it helps you determine a budget. Knowing how much you can borrow means you can avoid wasting time looking at properties that are out of your price range.
In Preston, home prices can vary widely between areas, such as Penwortham, Fulwood, and Longton, so having a clear idea of your budget will ensure you’re only looking at homes that fit within your financial means. Additionally, having an MIP makes the home search simple.
Increased Credibility with Sellers
Having a mortgage agreement in place shows sellers that you’re serious. If there are multiple offers on a house, an MIP can make your offer stand out. Sellers are more inclined to negotiate with a buyer who has a Mortgage in Principle, as it minimizes the risk of the transaction falling through due to financial complications.
Faster Mortgage Process
Once you have an offer accepted, having an MIP in place can speed up the process of securing a formal mortgage offer. Lenders already have your financial information and have given you an estimate, so the process moves quicker when you’re ready to submit a full application. Additionally, having an MIP helps you find a suitable home, as it ensures that the property meets the lenders' criteria and reduces potential delays.
Provides an Indication of How Much You Can Borrow
A mortgage in principle provides an indication of how much you can borrow based on your personal circumstances and credit history. It’s not a guarantee of a mortgage, but it gives you a good idea of your borrowing power and helps you understand how much you can afford to spend on a property.
Helps You Make an Informed Decision When Buying a Property
Having a mortgage in principle in hand can help you make an informed decision when buying a house. It gives you a clear idea of your budget and helps you avoid wasting time viewing houses that are outside of your price range. Additionally, it can give sellers confidence that you’re serious and can help you negotiate a better price.
3. Why Get a Mortgage in Principle?
To Understand Your Borrowing Power
A agreement in principle is essential to understand your borrowing power and make an informed decision when buying a home. Its a pivotal part of the home buying process. A useful way to do this is to use an online mortgage calculator. It helps you:
- Get an idea of how much you can borrow
- Understand your budget and avoid overspending
- Give sellers confidence that you can afford the property, especially if you're a first time buyer
- Make an informed decision when buying a home
By getting an agreement in principle online, you can ensure that you’re making a well-informed decision when buying a house and avoid any potential pitfalls along the way.
4. How to get a Mortgage agreement in principle
To obtain an MIP, you’ll need to approach a mortgage lender or mortgage broker. Be sure to check different lenders and other brokers, this will ensure you get the best service. Most lenders offer Video Appointments as their initial meeting, this helps them to understand if you have any money problems, any legal requirements you may have and most importantly to help fine you the right mortgage.
The application process is straightforward:
- Provide your financial details and documents: Many lenders will ask for details like your income, expenses, and any existing debt. Ensure you have all necessary supporting documents ready, such as proof of income, to ensure the accuracy of the submitted details.
- Full Credit check: The same lender will assess your credit rating to determine whether you’re a reliable borrower and that you meet their lending criteria. Lenders will also verify your information with credit reference agencies to confirm your identity and prevent fraudulent activities. This will also show that you can afford the monthly mortgage payments.
- Get a mortgage decision and receive your MIP: Based on your financial situation, the lender will issue an official mortgage offer, stating how much they’re willing to lend you. Getting a decision in principle is crucial for budgeting and instilling confidence in estate agents and sellers. Keep in mind that a Decision in Principle is not a mortgage offer.

Things to Consider Before Getting a Mortgage Agreement in Principle: Soft Credit Check
While an MIP can be very useful, there are a few things to keep in mind:
- Validity: Your Mortgage Offer is usually valid for about 30-90 days from the date of your Mortgage Application. If your mortgage in principle expires, you’ll need to reapply, which can result in a different decision from the lender due to changes in their risk rules or policies.
- It’s not a guarantee: Remember, an Agreement in Principle is an estimate, not a guarantee of loan approval. Once you find a specific property and apply for a mortgage, you can apply online for this, the lender will conduct a more detailed checks of your finances. You must complete a full mortgage application to receive a mortgage offer, even if you have a Decision in Principle Certificate.
- Multiple applications: Applying for MIPs from multiple mortgage lenders in a short period could slightly affect your credit score. However, if you use a broker, they may conduct a “soft” credit check that won’t affect your credit score. The principle affect of these soft checks is that they do not impact your credit rating or financial circumstances, unlike hard credit checks which can have a negative effect.
5. How MIP Affects Your Home-Buying Journey in Preston
Getting a Mortgage in Principle in Preston can make all the difference when buying a home. With the competitive nature of the Preston property market, having an MIP in place can give you a competitive edge, especially in areas like Fulwood, Penwortham, and Longton, where demand often outpaces supply. An MIP provides a personalized result regarding your loan potential, giving you a clear indication of how much you can afford.
At Key & Frame, we can guide you through the MIP process and connect you with trusted local mortgage advisors to ensure you get the best deal possible. This can significantly improve your chances of securing a certain amount and making a successful purchase.
Why You Should Get a Mortgage in Principle Early
Getting an Agreement in Principle is a smart and strategic step in the home-buying process. It clarifies your budget, speeds up the buying process, and demonstrates your seriousness to sellers. In a competitive market like Preston, this can make all the difference. Understanding your budget with an MIP not only helps you recognize your financial limits but also instils confidence in estate agents and sellers regarding your capability to complete a purchase.
If you need guidance on the process or are ready to buy a home in Preston, Key & Frame is here to help. Let us help you navigate the world of mortgages and find your perfect home in Preston.