United States
Lease and deposit rules vary by state and city. Mortgages may include escrow and, with a smaller down payment, mortgage insurance. Compare the APR and total closing costs - not just the advertised rate.
A roof over your head · 5 minute read
The biggest loan you will take, minus the jargon.
The biggest loan most people ever take, explained without the jargon that's designed to lose you. A mortgage is a loan to buy a home, with the home itself as collateral - miss enough payments and the bank can take it. You put some money down, borrow the rest, and pay it back over a long time (often 30 years) in monthly pieces.
What your payment is made of
Each monthly payment splits into principal (paying down what you borrowed) and interest (the bank's fee for lending). Early on, most of your payment is interest - that's "amortization," and it's why the balance barely moves in year one. It flips over time until the final years are almost all principal.
The down payment (and PMI)
The classic target is 20% down. Put down less and lenders usually add PMI (private mortgage insurance) - an extra monthly charge that protects them, not you, until you've built enough equity. You can buy with less than 20% down; just know PMI is part of that deal.
Fixed vs. adjustable, and the term
- Fixed rate - your rate never changes. Predictable; the default for most people.
- Adjustable (ARM) - starts lower, then can rise later. Cheaper now, riskier later.
- 15 vs. 30 years - a shorter term means higher monthly payments but far less total interest; a longer term is cheaper monthly but costs much more over the life of the loan.
The words they'll throw at you
- Escrow - the lender often bundles your property taxes and home insurance into the monthly payment and pays them for you. Handy, but it's why the payment is bigger than just "loan + interest."
- Pre-approval - a lender's estimate of what they'll lend you, gotten before you shop. Sellers take you more seriously with it in hand.
- Closing costs - fees to finalize the purchase (often a few percent of the price) due at the end, on top of the down payment. Budget for them; they blindside people.
A sane rule of thumb: aim to keep total housing cost around a third of your income or less. And ignore the line that renting is "throwing money away" - renting buys flexibility and zero repair bills. Owning is right when you're staying put long enough for it to pay off, not because someone made you feel behind.
Real help, wherever you are
The official source where you live
Services and numbers change over time. If one of these is wrong or missing for your country, telling us is worth more than anything else on this page.
Canada
Tenancy law is provincial or territorial. Deposits, rent increases, notice, and dispute processes vary, so use your province or territory's official tenancy office.
United Kingdom
Rules differ across England, Scotland, Wales, and Northern Ireland. Use the correct nation's official tenancy guidance for deposits, notices, repairs, and eviction.
Australia
Residential tenancy rules are state or territory law. Use the official tenancy authority where the property is, and compare home loans by comparison rate, fees, and features.
New Zealand
Tenancy Services is the official starting point for bonds, healthy homes, notices, and disputes. Mortgage structures and rates differ from the U.S.; compare total cost and break fees.
Ireland
Use the Residential Tenancies Board for current renting rules, deposits, notices, registration, and dispute resolution. Compare mortgages using APRC and total cost.
Worldwide
Tenancy, deposits, mortgages, and buyer protections are local law. Get every promise in writing and check the official housing or consumer authority where the home is.
Common questions
The questions people actually ask
What am I actually paying each month?
Principal reduces what you borrowed, interest is the lender's charge for the loan, and depending on where you are the payment may also carry property tax, insurance and mortgage insurance.
Should I compare interest rate or APR?
APR, and total closing costs alongside it. A headline rate with heavy fees attached routinely costs more than a slightly higher rate without them.
What is escrow?
An account your lender uses to collect property tax and insurance alongside the mortgage payment, then pays those bills for you. Common in some countries, unheard of in others.
Do I need a 20 percent deposit?
Usually no, but a smaller deposit often means paying mortgage insurance, which protects the lender rather than you and adds to the monthly cost until you have enough equity.
What is the most expensive mistake here?
Borrowing the maximum you are approved for. Approval is the lender's risk calculation, not a judgement about what leaves you room to live.
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