First-Time Homebuyer’s Guide to Mortgages

Happy couple holding keys to their new home

Photo: Happy Couple Holding a House Key on Pexels (free to use)

Buying your first home is exciting — and the mortgage process can feel like the most confusing part of it. Between down payments, interest rate types, and unfamiliar terminology, it’s easy to feel out of your depth. This guide walks through the essentials for first-time buyers in both the US and UK, from how much you’ll need upfront to the step-by-step process of getting a mortgage approved.

What Is a Mortgage?

A mortgage is a loan used to buy property, secured against the property itself. If you stop making payments, the lender has the legal right to repossess the home. Mortgages are typically repaid over long terms — commonly 25 to 30 years — through monthly installments that cover both interest and a portion of the loan principal.

How Much Deposit or Down Payment Do You Need?

In the US, down payments commonly range from 3% to 20% of the purchase price, depending on the loan type. Conventional loans often require at least 3-5% down, while FHA loans (government-backed, aimed at first-time and lower-credit buyers) can go as low as 3.5%. Putting down less than 20% on a conventional loan usually means paying for private mortgage insurance (PMI) until you build enough equity.

In the UK, most lenders require a minimum deposit of 5-10% of the property value, though a larger deposit (15%+) typically unlocks meaningfully better interest rates. Government schemes such as Lifetime ISAs can help first-time buyers save toward a deposit with a government bonus.

Types of Mortgages

Fixed-rate mortgage: The interest rate stays the same for the full term (US) or for a set initial period, commonly 2-5 years (UK), giving predictable monthly payments.
Adjustable-rate mortgage (ARM) / Tracker or Variable-rate mortgage: The rate can move up or down over time, usually tied to a benchmark rate — riskier if rates rise, but sometimes cheaper initially.
Government-backed loans (US): FHA, VA, and USDA loans offer lower down payment or credit requirements for eligible buyers.
Help to Buy / shared ownership (UK): Government-backed schemes that can reduce the deposit needed or allow buying a share of a property while renting the rest.

Keys and mortgage documents with house models on a desk

Photo: Real Estate Keys and Documents on Pexels (free to use)

The Mortgage Process, Step by Step

Check and improve your credit score before applying — this affects both approval odds and the interest rate you’re offered.
Get pre-approved (US) or a Decision in Principle / Agreement in Principle (UK): This gives you a realistic budget and shows sellers you’re a serious buyer.
House hunt within your approved budget, factoring in additional costs like closing costs (US) or stamp duty and solicitor fees (UK).
Make an offer and go under contract once you find the right property.
Complete the full mortgage application, including income verification, bank statements, and a property valuation or survey.
Underwriting and final approval: The lender confirms all details before issuing a formal mortgage offer.
Closing / Completion: Sign the final paperwork, pay closing costs or completion funds, and receive the keys.

Costs Beyond the Deposit

US closing costs: Typically 2-5% of the loan amount, covering appraisal fees, title insurance, origination fees, and more.
UK stamp duty (Stamp Duty Land Tax): A tax on property purchases above a certain threshold, with different rates depending on price band and whether you’re a first-time buyer.
Ongoing costs: Property taxes, homeowners/buildings insurance, and maintenance should all be budgeted for beyond the mortgage payment itself.

Common Mistakes First-Time Buyers Make

Maxing out the approved budget: Just because a lender approves a certain amount doesn’t mean it’s comfortable to repay alongside your other expenses.
Not shopping around for rates: Interest rates and fees can vary meaningfully between lenders for the same borrower profile.
Making large purchases or opening new credit before closing: This can affect your credit score and jeopardize final approval.
Underestimating total monthly costs: Forgetting to budget for insurance, taxes, or (in the UK) service charges on leasehold properties.
Skipping the home inspection or survey to save money, which can lead to costly surprises after moving in.

Final Thoughts

Getting a mortgage as a first-time buyer is a process with a lot of moving parts, but it follows a predictable sequence: understand your budget, get pre-approved, compare loan types and rates, and account for all the costs beyond the deposit itself. Taking the time to shop around and understand exactly what you’re signing up for can save thousands over the life of the loan.

This article is for general informational purposes only and does not constitute financial or mortgage advice. Speak with a licensed mortgage advisor or broker to discuss your specific situation.