Buying a home is a sequence of decisions, and this hub is the map. Deposit first, because it sets the loan size, the rate, and whether insurance applies. Then the payment — principal, interest, taxes, and insurance — because it decides what you can carry. Then the costs nobody puts on the price tag: closing costs, surveys, moving, and the reserve that keeps a broken boiler from becoming a crisis. Get those four in order and the process is manageable; skip one and the surprise arrives at the worst moment.

The two questions that dominate every buyer's inbox are how much deposit and how much mortgage. The honest answers are connected: work backwards from a monthly payment you can carry at a stressed rate, and the deposit is whatever makes that payment possible on your target price — provided it leaves purchase costs and a reserve intact. A percentage quoted on a forum is a starting point, not a strategy.

What every buyer should run before offering

  • Deposit: what it buys in rate and insurance, and what it costs in waiting time
  • Payment: principal, interest, tax, insurance, and any association fee as one number
  • Costs: closing costs and legal fees on top of the deposit, always
  • Timeline: how long the process takes in your country, and where the delays hide
  • Reserve: three to six months of the full housing cost before you offer

The buying guides below cover deposits, mortgage payments, the US and UK processes, due diligence, and the rent-versus-buy decision. When you have your numbers, the Home Affordability Calculator and Mortgage Calculator build the payment, the Down Payment Calculator and PMI Calculator handle the deposit side, and the Closing Cost Calculator makes sure completion day holds no invoice you have not seen.

First-time buyer versus international buyer

The two buyer profiles that dominate this hub face different problems. The first-time buyer usually has the income question sorted and the deposit question open: how long to save, whether to accept mortgage insurance, and how to price the waiting period if prices and rents rise meanwhile. The international buyer usually has the deposit sorted and the income question open: non-resident mortgages cost more, larger deposits are demanded, and the tax position — purchase tax, holding tax, and the tax on a future sale — needs professional advice in both countries, not one.

The good news is that the arithmetic is the same for both: payment at a stressed rate, deposit that leaves a reserve, costs that fit the cash-to-complete, and a timeline you can survive. Everything else is detail — important detail, but detail. If you recognise yourself in either profile, the guides below and the calculators linked from each one will cover the specifics of your case.

If you are at the very start of the process, do the affordability pass before the viewings: income, deposit, payment at a stressed rate, and the cash-to-complete including costs. It takes ten minutes with the calculators and it will save you from falling in love with a home your numbers cannot carry. The guides below then walk you through deposits, payments, costs, and the closing process in the order you will actually meet them.

Frequently asked questions

How much deposit do I need to buy a home?

Minimums vary by market: around 3.5 percent for FHA in the US, 5 percent for some first-time schemes in the UK and Australia, and 20 to 25 percent for expats in the UAE. Below 20 percent, expect mortgage insurance, higher rates, or both, so compare the monthly cost of a thin deposit against the years of saving for a thick one.

What costs are involved in buying a house?

Beyond the deposit, buyers pay closing or legal costs, surveys, lender fees, and often a transfer tax — typically 3 to 5 percent of the price in total. Budget these before you offer, because they arrive on completion day whether or not you remembered them.

How much house can I afford?

Work backwards from the payment: at a rate one or two points above the quote, with taxes, insurance, and a reserve, what monthly cost fits your income? Lenders use similar logic with stricter rules. The Home Affordability Calculator does this in minutes with your actual numbers.

What is the first step to buying a house?

Before viewings, before agents, run the affordability test: income, deposit, payment at a stressed rate, and the cash-to-complete including costs. Buyers who start with the house and retrofit the numbers are the buyers who fall in love with the wrong one.

Should I rent or buy right now?

Compare the total cost of each path over the years you expect to stay: rent paid, versus the mortgage, taxes, insurance, maintenance, and the purchase and sale costs of owning. The longer your horizon and the more stable your plans, the more the maths tends to favour buying.