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Learn About Mortgages

Plain-English guides to how mortgages and rates work, from your first question to closing day. No jargon, no sales pitch.

What is a mortgage?

How home loans work

How mortgage rates are set

Why rates change

APR vs interest rate

What APR really means

Discount points

Buying down the rate

Rate lock

When to lock

Fixed vs adjustable

Fixed vs ARM

PMI and MIP

Mortgage insurance

Escrow and PITI

What is in your payment

Debt-to-income

DTI explained

Credit scores

What score you need

Closing costs

What you pay

Amortization

How payoff works

Down payments

How much to put down

How to shop

Compare lenders

How much can you afford?

Find your price

Pre-approval

How it works

Home appraisal

Value and low appraisals

Rate buydowns

2-1 temporary buydowns

Loan Estimate vs CD

Compare the two forms

Seller concessions

Limits by loan type

Glossary

Every term defined

Today's rates

Live daily averages

Closing cost calculator

Estimate cash to close

Construction loan calculator

Draws and permanent payment

Where to start

Most people arrive at a mortgage question in one of three places: trying to understand what a payment is made of, trying to understand why a rate is what it is, or trying to get through a step of the process without a costly mistake. The guides above are grouped that way. If you are starting cold, read what a mortgage is, then escrow and PITI, and you will understand every line on a payment breakdown.

Understanding your payment

A mortgage payment is four things bundled together: principal, interest, property taxes, and homeowners insurance, which lenders shorten to PITI. Add mortgage insurance and HOA dues and you have the number that leaves your bank account. Almost every surprise at closing traces back to a buyer who compared principal and interest quotes while the real payment included three other pieces. Amortization explains why early payments are mostly interest, and PMI and MIP covers the insurance piece that varies most between loan programs.

Understanding your rate

Mortgage rates follow the mortgage-backed securities market, not the federal funds rate directly, which is why rates sometimes move the opposite direction from a Fed announcement. On top of the market rate, lenders apply adjustments for credit score, down payment, property type, and occupancy. Two people quoted on the same morning routinely get different numbers for that reason. Start with how mortgage rates are set, then APR versus interest rate so you compare offers on the number that includes fees. If you are weighing whether to pay for a lower rate, discount points and temporary buydowns cover both approaches.

Getting through the process

The sequence rarely changes: pre-approval, offer, application, appraisal, underwriting, clear to close, closing. The documents that matter most are the Loan Estimate you receive within three business days of applying and the Closing Disclosure you receive three business days before closing. Comparing those two forms line by line is the single best protection against junk fees, and this guide shows what is allowed to change between them. Rate lock covers when to lock, and appraisals covers what happens when the value comes in low.

How this content is built

Every guide here is written for a buyer, not for a search engine. Figures like mortgage insurance rates, funding fees, and loan limits are typical published values that change over time, so they are stated as ranges and as of-dates rather than promises. Nothing here is a rate quote or a loan approval. When a topic requires a decision about your specific file, the guide says so and points you to a licensed loan originator instead of guessing on your behalf.

Ready to run numbers? Try the payment calculator or browse all mortgage calculators.
Important disclosures. LoanFitCalc is a free educational tool that provides estimates only. It is not a loan, a loan approval, a commitment to lend, a rate lock, or an offer to make a loan, and it does not provide financial, legal, or tax advice or recommend a specific loan for you. Mortgage insurance rates, funding and guarantee fees, loan limits, taxes, and insurance figures are typical published values used for estimation and are subject to change. Program eligibility rules are summarized and simplified. Actual terms depend on your full application, credit, property, and lender underwriting. Consult a licensed mortgage loan originator before making any decision. LoanFitCalc is an independent educational website and is not a lender. ⌂ Equal Housing Opportunity
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