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1.  [Home](/)
2.  [Mortgage Guides](/mortgage-guides)
3.  MIP and Your Deposit 

UK Mortgage Guide

# Does a Mortgage in Principle Include Your Deposit?

One of the most common first-time-buyer misunderstandings: assuming a Mortgage in Principle (MIP) covers your whole purchase budget. It doesn't. The MIP is the loan figure only — your deposit is added on top — and getting that distinction right changes the price you can offer on a property.

First Rung Now Editorial  Updated 15 June 2026  7 min read 

On this page 

1.  [Key takeaways](#key-takeaways)
2.  [What a Mortgage in Principle actually is](#what-a-mortgage-in-principle-actually-is)
3.  [How the maths actually works](#how-the-maths-actually-works)
4.  [Don't forget the buying costs](#dont-forget-the-buying-costs)
5.  [What lenders check at MIP stage](#what-lenders-check-at-mip-stage)
6.  [How deposit size influences the MIP indirectly](#how-deposit-size-influences-the-mip-indirectly)
7.  [Common pitfalls](#common-pitfalls)
8.  [Reading the MIP as the offer price ceiling](#reading-the-mip-as-the-offer-price-ceiling)
9.  [Not adding the deposit to your search filters](#not-adding-the-deposit-to-your-search-filters)
10.  [Treating the MIP as a guarantee](#treating-the-mip-as-a-guarantee)
11.  [Letting the MIP expire](#letting-the-mip-expire)
12.  [Pros](#pros)
13.  [Cons](#cons)
14.  [Speak with a vetted mortgage broker about getting a Mortgage in Principle that reflects your real budget](#speak-with-a-vetted-mortgage-broker-about-getting-a-mortgage-in-principle-that-reflects-your-real-budget)
15.  [The simple formula to remember](#the-simple-formula-to-remember)
16.  [Frequently asked questions](#frequently-asked-questions)
17.  [Does a mortgage in principle include your deposit?](#does-a-mortgage-in-principle-include-your-deposit)
18.  [How do I work out my total purchase budget from an MIP?](#how-do-i-work-out-my-total-purchase-budget-from-an-mip)
19.  [Is the deposit subtracted from the MIP figure?](#is-the-deposit-subtracted-from-the-mip-figure)
20.  [Why doesn't the MIP include the deposit?](#why-doesnt-the-mip-include-the-deposit)
21.  [Will the lender check my deposit at MIP stage?](#will-the-lender-check-my-deposit-at-mip-stage)
22.  [Can I increase my MIP by putting down a bigger deposit?](#can-i-increase-my-mip-by-putting-down-a-bigger-deposit)
23.  [Related guides](#related-guides)
24.  [UK Mortgages Hub](#uk-mortgages-hub)
25.  [Mortgage Calculators](#mortgage-calculators)
26.  [Find a Mortgage Broker](#find-a-mortgage-broker)

### First-time buyers — related reads

MIPs, deposits, schemes and the UK buying process.

-   [House buying timeline What actually happens — and how long it takes — between offer accepted and keys. ](/house-buying-timeline)
-   [£300k home loan Salary, deposit, monthly cost and stamp duty for a £300,000 mortgage. ](/300k-home-loan)
-   [Help to Buy calculator Equity loan repayment maths and the schemes that replaced Help to Buy in England. ](/help-to-buy-calculator-mortgage)
-   [No deposit mortgage Every active UK 100% LTV product and the trade-offs that decide fit. ](/no-deposit-mortgage)
-   [FTB affordability rules 2026 The three affordability tests, stress rates and LTI limits shaping 2026 budgets. ](/first-time-buyer-affordability-rules-2026)

Explore the hubs

[Mortgages explained](/mortgages)[Remortgages](/remortgages)[Buy-to-let mortgages](/buy-to-let)[Bad credit mortgages](/bad-credit-mortgages)[Mortgage calculators](/mortgage-calculators)[All mortgage guides](/mortgage-guides)[Find a mortgage broker](/find-a-mortgage-broker)

## Key takeaways

-   An MIP shows the loan amount only — it does not include your deposit. 
-   Your purchase budget = MIP + deposit − buying costs. 
-   At MIP stage, lenders confirm you have a deposit but don't deeply verify it. 
-   A larger deposit reduces LTV, which can indirectly raise your MIP via cheaper stress rates. 
-   MIPs are typically valid for 30–90 days and rely on a soft credit search. 

## What a Mortgage in Principle actually is

Want a vetted broker to help with What a Mortgage in Principle actually is?

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A Mortgage in Principle (also called an Agreement in Principle or Decision in Principle) is a written indication from a lender that, based on the information you've supplied, they would in principle be willing to lend you up to a stated figure. It is not a binding mortgage offer. Lenders run a soft credit search and run your declared income and outgoings through their affordability calculator to arrive at the figure. The MIP itself sits between you and the lender as a confidence document — it tells estate agents and sellers that you're a credible buyer and gives you a working number to budget against.

Crucially, the MIP is calculated as: **income × the lender's multiple, capped by affordability and LTV criteria**. The lender's own money is the only thing being quoted. Your deposit is not part of the calculation and is not part of the figure shown on the MIP certificate.

## How the maths actually works

First-time buyers · keep reading

-   [House buying timeline  What actually happens — and how long it takes — between offer accepted and keys. ](/house-buying-timeline)
-   [£300k home loan  Salary, deposit, monthly cost and stamp duty for a £300,000 mortgage. ](/300k-home-loan)

Browse the full hub: [Mortgages explained](/mortgages)

Want a vetted broker to help with How the maths actually works?

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Let's run a typical first-time-buyer example to make the relationship concrete.

-   Combined income: £60,000.
-   Lender's income multiple: 4.5×.
-   Indicative maximum loan: £270,000.
-   Your deposit: £30,000.
-   MIP issued: £270,000.

That £270,000 MIP figure is the _loan_. Your total purchase budget is £270,000 + £30,000 deposit = £300,000. If you make a £300,000 offer, the lender will fund £270,000 (a 90% LTV mortgage) and you'll fund the remaining £30,000 yourself.

If you misread the MIP as "your whole budget" and offered £270,000 on the same property, you'd actually be over-buying relative to the loan: you'd need a £240,000 loan, your £30,000 would still cover the deposit, but you'd have given up £30,000 of buying power that the lender was already willing to provide.

## Don't forget the buying costs

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The MIP-plus-deposit number is your gross budget. Your _net_ purchase budget is lower because you need to keep cash back for the costs of completing the purchase:

-   **Stamp Duty** — none for most FTBs buying at or below £425,000 in England; surcharges apply on additional properties and on purchases above the threshold.
-   **Conveyancing** — typically £900–£1,800 including disbursements.
-   **Mortgage product fee** — £0–£1,999 depending on the deal.
-   **Valuation** — often free on residential remortgages; £200–£900 on purchases.
-   **Broker fee** — £0–£999 depending on the firm.
-   **Surveys** — £400–£1,500 for HomeBuyer or Building Surveys (optional but recommended).
-   **Removals and incidentals** — £500–£2,000.

For a £300,000 FTB purchase, plan on £3,000–£6,000 of buying costs. That comes out of your deposit pot, not the loan, so the cash you need at the start is your deposit _plus_ these costs.

## What lenders check at MIP stage

First-time buyers · keep reading

-   [Help to Buy calculator  Equity loan repayment maths and the schemes that replaced Help to Buy in England. ](/help-to-buy-calculator-mortgage)
-   [No deposit mortgage  Every active UK 100% LTV product and the trade-offs that decide fit. ](/no-deposit-mortgage)

Browse the full hub: [Mortgages explained](/mortgages)

Want a vetted broker to help with What lenders check at MIP stage?

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An MIP is intentionally light-touch. The lender typically verifies:

-   Identity (name, date of birth, address).
-   Income figure (declared, not yet evidenced).
-   Outgoings and existing credit commitments.
-   Credit footprint via a soft search.
-   Deposit existence — yes/no, plus rough amount and source category.

What lenders _don't_ typically do at MIP stage: pull your full bank statements, verify your payslips line by line, run a property valuation, or do a hard credit search. All of that happens at full application, which is why an MIP can occasionally be reduced or withdrawn when the full case is underwritten.

## How deposit size influences the MIP indirectly

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While the deposit isn't _inside_ the MIP figure, the size of your deposit can influence the MIP figure the lender is willing to issue. Here's why:

-   **Cheaper rates at lower LTVs.** A 75% LTV mortgage carries a lower rate than a 95% LTV mortgage. Lenders stress-test affordability at the actual rate plus a buffer — so a smaller loan at a cheaper rate passes affordability more easily, sometimes letting the lender offer a higher maximum loan.
-   **Removing the LTV cap.** Some lenders cap the maximum loan size at high LTVs (e.g. £570,000 above 90% LTV). A larger deposit moves you below the cap.
-   **Income multiple uplifts.** A handful of lenders offer 5× to 5.5× income multiples on lower-LTV applications, where 4.5× would apply at higher LTVs.

## Common pitfalls

First-time buyers · keep reading

-   [FTB affordability rules 2026  The three affordability tests, stress rates and LTI limits shaping 2026 budgets. ](/first-time-buyer-affordability-rules-2026)
-   [High income multiple mortgages  Enhanced and professional schemes that lift a first-time buyer budget. ](/first-time-buyer-high-income-multiple-mortgage)

Browse the full hub: [Mortgages explained](/mortgages)

Want a vetted broker to help with Common pitfalls?

Free FCA-regulated introduction. We carefully check the broker matches your scenario — no pressure, no upfront fees.

[Match me with a broker](/find-a-mortgage-broker)

### Reading the MIP as the offer price ceiling

Offer up to MIP + deposit, not just MIP. Sellers and agents notice the difference.

### Not adding the deposit to your search filters

Property portal filters take the maximum purchase price — that's MIP + deposit, not MIP alone. Filter incorrectly and you'll miss perfectly affordable homes.

### Treating the MIP as a guarantee

It isn't. The full application can adjust the figure up or down once income, deposit and property valuation are verified. A drop in income, a new credit commitment or an under-valuation can all change the picture.

### Letting the MIP expire

Most are valid 30–90 days. Renewals usually re-run the soft search rather than a full underwrite, but lender criteria can change in the gap.

### Pros

-   Gives sellers and agents confidence in your offer.
-   Sets a realistic working budget without committing to a lender.
-   Soft search only — no impact on your credit file at this stage.
-   Helps surface affordability issues before you fall in love with a property.
-   Quick to obtain — often issued within minutes online.

### Cons

-   Not a binding offer — the full application can change the figure.
-   Easy to misread as the whole purchase budget when it's the loan only.
-   Multiple MIPs in quick succession can leave footprints visible to some lenders.
-   Doesn't include any property-specific assessment — only your personal numbers.
-   Expires — typically 30–90 days.

Vetted UK Broker Match

### Speak with a vetted mortgage broker about getting a Mortgage in Principle that reflects your real budget

Free, no-obligation introduction to an FCA-regulated adviser with experience in your specific scenario. We've done the due diligence so you don't have to.

-   FCA-regulated only
-   Typical reply in 1 working day
-   No upfront fees

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## The simple formula to remember

Want a vetted broker to help with The simple formula to remember?

Free FCA-regulated introduction. We carefully check the broker matches your scenario — no pressure, no upfront fees.

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> **Maximum offer price = MIP + deposit.** Then subtract buying costs to get your true net spending budget on a property. That single equation prevents almost every common MIP-related buying mistake.

## Frequently asked questions

### Does a mortgage in principle include your deposit?

### How do I work out my total purchase budget from an MIP?

### Is the deposit subtracted from the MIP figure?

### Why doesn't the MIP include the deposit?

### Will the lender check my deposit at MIP stage?

### Can I increase my MIP by putting down a bigger deposit?

## Related guides

[

### UK Mortgages Hub

How residential mortgages work from MIP through to completion.

Read guide ](/mortgages)[

### Mortgage Calculators

Repayment, affordability, LTV and stamp duty calculators.

Read guide ](/mortgage-calculators)[

### Find a Mortgage Broker

Speak to a vetted UK broker to get an accurate MIP first time.

Read guide ](/find-a-mortgage-broker)

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-   [Fixed vs Tracker](/fixed-vs-tracker-mortgage)
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