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How Mortgage Payments Are Calculated

By Mr Umer6 min readUpdated October 2026

Principal, interest, tax and insurance explained, plus how term and rate change what you pay.

What makes up a payment

A typical monthly payment has up to four parts: principal, interest, property tax and home insurance. Together lenders sometimes call these PITI. Some borrowers also pay mortgage insurance if their deposit is small.

Principal and interest

Principal is the amount borrowed. Interest is the lender's charge. A standard fixed loan is amortised, meaning the payment stays the same but the split changes: early payments are mostly interest and later ones are mostly principal.

A real example

Borrow $280,000 at 6.5% for 30 years and the payment is about $1,770. Over the whole loan you would pay roughly $357,000 in interest. A 15-year loan at 6.0% would cost about $2,360 a month but save a large share of that interest.

Why the term matters

A longer term lowers the monthly bill but increases total interest. A shorter term raises the bill but builds equity faster. Choose the shortest term that leaves you comfortable.

Ways to cut the cost

Save a bigger deposit, improve your credit profile before applying, compare several lenders and consider extra payments when possible. Always check for prepayment penalties.

Next step

Use the mortgage payment calculator to compare scenarios side by side before speaking to a lender.

General information and education only. Not financial, tax, investment or legal advice. Rules and rates differ by country, so check official sources.

Mr Umer researches and writes every guide on PakFinanceGuides. Read our editorial policy or write to contact@pakfinanceguides.com.