The First-Time Buyer Mortgage Process: From AIP to Completion in 2026

This guide is general information, not regulated advice. Your own timeline depends on lender, chain length, property type, and conveyancer responsiveness. Your home may be repossessed if you do not keep up repayments on your mortgage.

The 9 stages of a UK first-time buyer purchase

What causes the most delays

• Conveyancing chain length. A chain-free purchase typically completes in 8-10 weeks. A chain of 3 buyers/sellers usually extends to 12-14 weeks; chains of 5+ to 4-6 months.
• Leasehold management packs. Leasehold flats require the freeholder's management pack (typically £200-£400, taking 2-6 weeks). This is often the single slowest step.
• Local authority search backlog. Some councils have 4-8 week search turnaround times. Personal searches are faster (1-2 weeks) but more expensive.
• Mortgage offer expiry. If completion takes more than 3-6 months, your mortgage offer may expire. Renewing usually requires re-verification of income.
• Survey-driven renegotiation. If the survey finds material issues (subsidence, damp, dry rot, asbestos), price renegotiation or remedial-works clauses can delay exchange.
• Buildings insurance not in place. Solicitors won't exchange until you have insurance from exchange date. Sort this out 1-2 weeks before exchange.
• Funds not yet in your conveyancer's account. Deposit funds must be cleared in the solicitor's client account before exchange. Bank transfers can take 1-3 working days.

Documents you need ready

Gather these before formal mortgage application. Missing documents are the #1 cause of preventable delays.

• ID: passport, driving licence.
• Proof of address: 3 months of utility bills, council tax, or bank statements (max 3 months old).
• Income: 3 months payslips, P60 (employed); 2 years SA302s + Tax Year Overviews (self-employed); 2 years company accounts + accountant reference (limited company directors).
• Bank statements: 3 months personal account; 3 months business account if applicable.
• Deposit source documents: savings account statements showing accumulation, gifted deposit letter + donor source-of-funds, LISA closure proof, sale of asset documentation.
• Credit report: pull your own from Experian, Equifax, TransUnion before applying.
• Property documents: memorandum of sale from estate agent, EPC, leasehold information (if applicable).

Full checklist: see our documents checklist.

How to speed it up

• Get AIP before house-hunting (faster offers; vendor takes you seriously).
• Use a broker who has placement relationships with multiple lenders.
• Instruct your solicitor the day your offer is accepted (don't wait for the mortgage offer).
• Submit all documentation in one batch; respond to enquiries within 24 hours.
• Choose a chain-free property if speed matters - vacant possession or new-build.
• For leaseholds, request the management pack early (your solicitor will know who to chase).
• Have buildings insurance lined up before exchange (broker can recommend providers).
• Pre-fund your deposit into the solicitor's client account 1-2 weeks before exchange.

What happens after completion

The deal isn't fully done at completion. Within the first weeks:

• Solicitor submits SDLT return to HMRC within 14 days of completion (LBTT in Scotland 30 days; LTT in Wales 30 days). They pay it out of completion funds.
• Solicitor registers the new ownership with the Land Registry (4-8 weeks typically). The lender's charge over the property is registered at the same time.
• Your first mortgage payment falls about a calendar month after completion (some lenders charge a pro-rata first month).
• Set up direct debits for council tax, utilities, and any leasehold service charges.
• Update your address with HMRC, employer, banks, and the electoral roll.

What to do next

If you're at the start of the process, get an AIP via a broker - it's the entry ticket. Match with a broker who specialises in first-time buyers and can issue an AIP within hours. If you're already mid-process, the deposit guide, SDLT guide, and borrowing guide cover the financial decisions still in front of you.