Do I Need an AIP Before Making an Offer on a Property?

Buying a home is one of the most exciting milestones you’ll ever reach. But it can also be overwhelming — especially if it’s your first time. Between estate agents, deposits, legal jargon and bidding wars, it’s no wonder so many people feel lost before they even get started.

One of the biggest questions we hear at Strive is:

👉 “Do I need an Agreement in Principle (AIP) before I make an offer on a property?”

The answer isn’t as simple as yes or no — so let’s break it down.

What Exactly Is an AIP?

An Agreement in Principle (sometimes called a Decision in Principle (DIP) or Mortgage in Principle (MIP)) is essentially a note from a lender saying: “Based on what we know about you right now, we’d be prepared to lend you up to £X.”

Think of it as a financial green light. It’s not a full mortgage offer, but it’s enough to show estate agents and sellers that you’re serious.

A few key points:

• Most AIPs involve a soft credit check, which won’t leave a footprint on your report. Some lenders run a hard check, which does show up — so always ask before applying.
• An AIP doesn’t lock you in. You’re free to shop around for better deals once your offer is accepted.
• You can get one yourself online, through your bank, or via a mortgage broker. Many brokers (including us) can arrange one in a day.

It’s quick, painless, and costs nothing — but it can make all the difference.

Do You Need an AIP to Make an Offer?

Legally, no. You can put in an offer without one. There’s no law stopping you from calling up the agent and saying “I’d like to buy this property.”

But here’s the reality:

• Estate agents and sellers take buyers with an AIP more seriously.
• In competitive markets, an AIP can put you ahead of the pack.
• Without one, your offer might not even be considered.

Imagine two buyers walk into a viewing. Both love the house. Both make an offer. One has an AIP, the other doesn’t. Who do you think the seller will trust more?

Even if your offer is accepted without an AIP, the seller may refuse to take the property off the market until you provide one. That leaves the door open for another buyer to swoop in and secure the deal.

So while it isn’t mandatory, in practice it’s one of the smartest things you can do before you start offering.

What Else Might Agents Ask For?

This is where things vary. Some agents are easy-going and just want an AIP. Others can be far more thorough. It depends not only on the agency but also on the seller’s preferences.

Common requests include:

• Your AIP.
• Proof of deposit (bank statements).
• Photo ID (passport or driving licence).
• Sometimes even solicitor details.

The stricter agents argue that they’re protecting the seller from time-wasters. The looser ones argue that it’s better to get the ball rolling and worry about details later.

Our advice? Have these documents ready. It makes you look prepared and can speed up the process.

Do You Have to Use the Estate Agent’s Mortgage Broker?

This is a huge one — and a trap many first-time buyers fall into.

Estate agents often “recommend” their in-house mortgage broker. What they don’t always say is that you’re under no obligation to use them.

In fact, there are reasons why you might want to avoid them:

• Their panel of lenders is often smaller. That means fewer options and potentially worse rates.
• They can be pushy. BBC Panorama even ran an investigation into the pressure tactics some of these brokers use (watch here).
• While they shouldn’t, details of your budget or mortgage offer can sometimes make their way back to the estate agent — not ideal when you’re negotiating.

At Strive, we work for you, not the agent. We search across the whole market to find the deal that suits your needs, not theirs.

Common Questions About AIPs

Does an AIP affect my credit score?

If it’s a soft check, it won’t affect your score at all. A hard check does leave a mark, but one or two are nothing to worry about.

Does it tie me to a lender or rate?

No. Your AIP is just a snapshot of what you could borrow. You’re free to shop around once your offer is accepted.

How long does it last?

Usually around 3 months, sometimes up to 6. If yours expires, you can reapply or extend it.

What information do I need to get one?

Normally: ID, payslips (or accounts if self-employed), and proof of deposit.

How fast can I get one?

With us? Often the same day or next day.

Should You Bother Getting an AIP?

Let’s be real. Buying a house is stressful enough. Why add more hassle later when you can sort an AIP upfront?

Getting one:

• Costs nothing.
• Takes little time.
• Strengthens your negotiating position.
• Gives you confidence in your budget.

It’s not legally required — but in practice, it’s one of the easiest wins in the home-buying process.

Strive: Quick, Hassle-Free AIPs

At Strive, we’ve helped thousands of buyers secure their dream homes. We know how estate agents think, what sellers want to see, and how to get you in the strongest position possible.

We can usually secure an AIP within 24 hours of speaking with you. No stress, no confusion — just clarity and confidence as you make your offer.

👉 Ready to move forward? Get in touch today and let’s get your AIP sorted.