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    First-Time Buyer Mortgage in Principle: The 2026 UK Guide

    A Mortgage in Principle (MIP) is the first meaningful step in your journey as a first-time buyer. It converts a vague sense of what you might be able to borrow into a written figure that unlocks estate agent doors. But not all MIPs are equal — the wrong type, from the wrong lender, at the wrong time can knock 30 points off your credit score, or lock you to a lender that won't ultimately approve you. This guide explains exactly how to get an MIP as an FTB, which lender to start with, and how to convert your MIP into a full mortgage offer without hitting the common traps.

    First Rung Now Editorial Updated 15 June 2026 7 min read

    What a mortgage in principle actually is

    An MIP is a lender's written indication of how much they would in principle lend to you, based on the basic income and credit check they run at that point. It confirms three things: you exist, you have the income the lender needs to see, and your credit file passes their initial scorecard. It does NOT confirm the specific rate, the specific property, or that a full underwriter would ultimately approve you.

    Why FTBs need one before anything else

    • UK estate agents require sight of an MIP before submitting your offer.
    • Sellers of desirable properties use MIP status as a shortlisting tool.
    • It gives you a realistic budget for property searches, avoiding wasted viewings.
    • It exposes any credit issues 3–6 months before you formally apply — giving you time to fix them.

    Soft search vs hard search — the most important MIP decision

    A soft credit search is only visible to you; other lenders can't see it. A hard search stays on your file for 12 months and is visible to every lender who runs a credit check. Multiple hard searches in 90 days signal financial distress and materially reduce your chance of a full offer.

    Lenders that use soft searches at MIP stage (safe to try)

    • Nationwide, Halifax, Skipton, Yorkshire BS, Coventry BS, Nottingham BS, TSB (varies)

    Lenders that use hard searches at MIP stage (only run once you're ready)

    • Barclays, HSBC, NatWest, Santander (typically), Metro Bank

    The right sequence for an FTB: run 2–3 soft-search MIPs first to test scorecards, then only run a hard-search MIP with the lender you actually intend to apply to.

    Exactly what information you need to get an MIP

    1. Full name, date of birth, current address (with 3-year address history)
    2. Marital status and number of financial dependants
    3. Employment status, employer, gross annual salary + any bonus/overtime
    4. For self-employed: 2 years of accounts or SA302s
    5. Monthly outgoings: rent, credit card minimums, loans, car finance, childcare
    6. Total deposit available and its source (savings, gift, LISA, sale proceeds)
    7. Target property price range

    How to make sure your MIP converts to a full offer

    1. Be honest on the application

    Every figure — income, outgoings, existing credit — gets verified in full underwriting. Inflating income by £3,000 to hit a target loan is the fastest way to fail underwriting and lose the property.

    2. Freeze new credit between MIP and offer

    Don't apply for new credit cards, car finance, BNPL agreements or overdraft increases. Even soft searches for insurance quotes can affect a marginal scorecard.

    3. Keep bank statements clean for 3 months

    Lenders review the last 3 months of bank statements. Avoid: gambling transactions, undeclared regular payments (child maintenance, private loans), sustained daily overdraft use.

    4. Match income evidence to the MIP figures

    If you declared £3,500/month gross, your payslips must show £3,500/month gross. Any discrepancy triggers manual underwriting and often reduced loan amounts.

    5. Get the property valued conservatively

    If a lender's surveyor down-values the property below your agreed price, they'll only lend on the lower figure. Ask your broker or estate agent for recent sold-prices in the street before you offer.

    What to do if your first MIP gets declined

    1. Don't immediately re-apply to another lender.
    2. Get free credit reports from Experian, Equifax and TransUnion.
    3. Identify the cause: thin file, past defaults, high utilisation, address history gaps.
    4. Speak to a broker with adverse credit experience — see our FTB adverse credit guide.
    5. Wait 3–6 months of clean activity before re-applying if the issue is behavioural.

    Frequently asked questions