Halifax Agreement in Principle: What It Is, How It Works, and How to Get One
Before you make an offer on a property, you need to know how much a lender will actually lend you — not just what a calculator suggests. A Halifax Agreement in Principle (AIP) gives you exactly that: a written indication of how much Halifax is willing to lend, based on a real assessment of your income, outgoings and credit profile.
Estate agents take AIPs seriously. Having one in place before you start viewing properties demonstrates that you are a credible, proceedable buyer — and in competitive markets, it can be the difference between your offer being accepted and a vendor choosing someone else.
This guide explains exactly what a Halifax AIP is, what it checks, how long it lasts, and how to get one — whether you are employed, a contractor, self-employed, a foreign national, or on a visa.
Does a Halifax AIP Affect Your Credit Score?
No — Halifax uses a soft credit search for the AIP.
A soft credit search is visible on your own credit report but is not visible to other lenders and does not affect your credit score. You can obtain multiple AIPs from different lenders using soft searches without any impact on your credit file.
This is one of Halifax’s key advantages at the AIP stage. Some lenders conduct a hard search at AIP, which leaves a footprint and can negatively affect your score if repeated. Halifax’s soft search approach means you can check your position without any credit consequences.
The hard credit search occurs at the full mortgage application stage — not at AIP. This is standard across lenders.
What Is a Halifax Agreement in Principle?
A Halifax Agreement in Principle — also called a Decision in Principle, Mortgage in Principle, or Mortgage Promise — is a conditional statement from Halifax confirming how much they would be prepared to lend you, subject to a full application and property assessment.
It is not a mortgage offer. It does not guarantee you will receive a mortgage. But it is based on real data — your income, your outgoings, and a credit check — and it gives you a reliable picture of your borrowing capacity before you start the formal application process.
What a Halifax AIP does
- Confirms how much Halifax is prepared to lend in principle
- Gives you a figure you can use when searching for properties
- Provides evidence of lending intent to show estate agents and vendors
- Identifies any potential issues with your application before a full submission
- Holds a position with Halifax while your property search continues
What a Halifax AIP does not do
- Does not guarantee a final mortgage offer
- Does not reserve a specific interest rate or product
- Is not a binding commitment from Halifax
- Does not replace the full mortgage application and underwriting process
- Does not confirm final approval after full financial checks
How Long Does a Halifax AIP Last?
A Halifax Agreement in Principle typically lasts 90 days (three months).
If your property search takes longer than this — which is common, particularly for first-time buyers or those in competitive markets — the AIP can usually be refreshed or extended. A new soft credit check will be carried out and you may be asked to confirm that your circumstances have not changed.
Important: If your circumstances change materially between the AIP and the full application — for example, you change jobs, take on new credit, or your income changes — the AIP figure may no longer hold. Always speak to your adviser before the full application if anything has changed.
What Does Halifax Check at AIP Stage?
Halifax's AIP assessment covers the key affordability and credit factors, though not at the same depth as the full application:
Income
Halifax will ask you to declare your income. How they assess this depends on your employment type — see the section below for how each type is handled. The AIP figure is driven primarily by this income assessment.
Outgoings
Regular financial commitments — loan payments, credit card minimum payments, car finance, other mortgage payments — are factored into affordability. This reduces the available borrowing from the gross income figure.
Credit profile
Halifax conducts a soft credit search at AIP stage. This checks: Your credit history and payment record. Existing debt levels. Any adverse credit events (defaults, CCJs, missed payments). . Electoral roll registration
Deposit
You will be asked to confirm your deposit amount and source. The deposit determines your loan-to-value ratio, which affects which rate bands are available.
How Much Can You Borrow? AIP Figures by Income Type
The AIP figure Halifax returns is based on your assessed income multiplied by their affordability model. In most standard cases, this produces a figure broadly in the range of 4.5× to 5× annual income, subject to outgoings and credit profile.
Employed (PAYE)
Halifax uses your basic salary plus any regular, contractual overtime or bonus income. Three months’ payslips and your P60 will be required at full application.
Example: £55,000 basic salary → AIP figure broadly £247,500–£275,000 at 4.5–5×.
Step-by-Step: How to Get a Halifax AIP Through Mortgage Knight
Initial conversation with your adviser
Your adviser at Mortgage Knight reviews your income type, employment structure, credit position, and deposit. For contractors, this includes confirming your day rate, contract type, and whether you meet Halifax’s minimum thresholds. For foreign nationals, your residency position and visa type are confirmed.
This review takes typically 20–30 minutes and ensures the AIP is submitted correctly from the outset.
Income and deposit confirmation
You confirm your income figure — for contractors, this is your day rate annualised (day rate × 5 × 46). For PAYE applicants, this is your basic salary plus regular contractual extras. Your adviser will confirm the correct figure to use.
You confirm your deposit amount and source. For overseas deposits, a source of funds paper trail should be considered at this stage.
AIP submission
Your adviser submits the AIP to Halifax using the correct employment classification and income figure. Halifax’s system returns a decision — in most cases instantly or within the same working day
The AIP comes back as a certificate confirming the maximum borrowing figure Halifax will consider in principle.
AIP certificate issued
You receive the AIP certificate. This can be presented to estate agents when making offers. It is valid for 90 days.
Property search
Full application
Once you have had an offer accepted on a property, your adviser submits the full mortgage application to Halifax with complete supporting documents. The full application involves a hard credit search, document verification, property valuation, and underwriting.
Umbrella company contractors
Halifax accepts umbrella company income at AIP and full application stage. The income is based on the gross contractual pay rate confirmed by your contract and payslips. If your contract confirms a daily or hourly rate, Halifax can treat the full gross rate as income without requiring it to be broken into separate elements.
You will need payslips and your contract available for the full application. For the AIP, you declare the gross annualised income.
Why Get Your Halifax AIP Through Mortgage Knight?
Correct classification from the start
For contractors and foreign nationals especially, the difference between a correctly and incorrectly submitted AIP is significant — sometimes tens of thousands of pounds in the indicated borrowing figure. We know exactly how to present your case to Halifax.
Whole-of-market comparison
An AIP with Halifax does not commit you to Halifax. Once you have a property in mind, we compare Halifax's full application terms against the whole market — including rate, fees and criteria — to confirm Halifax is still the right lender for your specific purchase.
Same-day in most cases
Once we have your details and income confirmation, we typically submit and receive the Halifax AIP the same working day.
No obligation
There is no fee for the AIP itself. Mortgage Knight's broker fee of £495 applies only when you proceed to a full mortgage application.
Contractors — Key Points
Halifax AIP vs Full Mortgage Application — Key Differences
| Halifax AIP | Full Mortgage Application | |
|---|---|---|
| Credit check | Soft (no impact on score) | Hard (leaves footprint) |
| Income verification | Declared only | Full documentation required |
| Property | Not required | Required (specific address) |
| Valuation | No | Yes — lender arranges |
| Legal work | No | Yes — conveyancing required |
| Decision time | Instant to same day | 4–8 weeks to offer |
| Output | AIP certificate | Formal mortgage offer |
| Binding | No | Yes — subject to conditions |
Frequently Asked Questions
Q: What is a Halifax Agreement in Principle?
A Halifax Agreement in Principle is a conditional indication of how much Halifax would be prepared to lend you, based on your declared income, outgoings and a soft credit check. It is not a mortgage offer but gives you a reliable borrowing figure to use during your property search and provides evidence of lending intent to show estate agents.
Q: Does a Halifax AIP affect my credit score?
No. Halifax uses a soft credit search at AIP stage, which is visible on your own credit file but not to other lenders and does not affect your credit score. The hard credit search occurs only at full mortgage application stage.
Q: How long does a Halifax AIP last?
A Halifax AIP typically lasts 90 days. If it expires during your property search it can usually be refreshed with a new soft credit check and confirmation that your circumstances have not changed.
Q: Can I get a Halifax AIP if I have just started contracting?
Yes in many cases. Halifax accepts day one contractors where you have at least two years of experience in the same industry. Your adviser will confirm eligibility before submission.
Q: What is the difference between an AIP and a mortgage offer?
An AIP is an indication of lending based on declared information and a soft credit check — it is not binding. A mortgage offer is issued after a full application, document verification, hard credit check, and property valuation. Only the mortgage offer is binding on Halifax.
