Buying a home is one of the largest financial decisions most people ever make. Unless you can pay cash, a mortgage is how it gets done — and understanding the basics before you sign anything will save you money and stress.
This guide breaks down what a mortgage is, what your monthly payment actually covers, the major loan types available, and how to find and apply for one.
What Is a Mortgage?
A mortgage — also called a lien or claim against property — is a debt instrument issued by a financial institution (the lender) to help you buy real estate. The home itself serves as collateral. If you stop making payments, the lender has the legal right to sell the property to recover what they’re owed.
Both individuals and businesses use mortgages to purchase real estate without paying the full price upfront. Once the loan is fully repaid — with no unpaid taxes or other outstanding claims — the property is considered “free and clear.”
What Does a Mortgage Payment Cover?
Your monthly mortgage payment typically has four components, often abbreviated as PITI:
Principal
The principal is the original amount you borrowed, minus any payments already applied to that balance. On an amortizing mortgage (like a standard 30-year fixed), each payment chips away at both principal and interest, so the full balance is paid off by the end of the loan term.
Interest
Interest is the cost you pay the lender for the use of their money. It’s expressed as an annual percentage rate (APR) and varies significantly by loan type, term length, and your credit profile.
Taxes
Many lenders require property taxes to be collected monthly and held in an escrow account. The lender then pays the tax bill on your behalf when it’s due.
Homeowners Insurance
Lenders almost universally require you to carry homeowners insurance, which covers damage from fires, storms, and other hazards. Premiums are often collected monthly and paid from escrow alongside property taxes — and they’ve been rising fast, as why homeowners insurance is so expensive explains. Some borrowers ask whether they can put the monthly payment on plastic for the rewards; paying your mortgage with a credit card walks through the fees and tradeoffs before you try.
Mortgage Insurance
If your down payment is less than 20% of the purchase price, most lenders will require mortgage insurance — which protects the lender (not you) if you default. There are two main types:
- Private mortgage insurance (PMI): Required for conventional loans with less than 20% down. Can be cancelled once your equity reaches 20% — see how to get rid of PMI for the exact cancellation rules, or how to avoid mortgage insurance entirely.
- Government mortgage insurance: Required for FHA loans. Includes an upfront premium plus annual premiums that may persist for the life of the loan depending on your down payment size.
Types of Mortgage Loans
Conventional Mortgage
A conventional mortgage is not backed by any government agency. They come in two flavors:
- Conforming loans meet the guidelines set by Fannie Mae and Freddie Mac, including loan size limits set annually by the FHFA. Check the current conforming loan limits before you shop — limits adjust each year.
- Non-conforming loans don’t meet those guidelines (jumbo loans are the most common example).
Key facts for conventional loans:
- Down payment as low as 3% for Fannie/Freddie-backed loans
- Minimum FICO score generally 620 or higher
- PMI required below 20% down; cancellable once you hit 20% equity
- Usable on primary homes, second homes, and investment properties
- Can have lower overall borrowing costs than government-backed options
Jumbo Mortgage
Jumbo loans exceed the conforming loan limits and are common in high-cost markets. Because they aren’t backed by Fannie or Freddie, lenders take on more risk — so the bar is higher:
- Generally requires a FICO score of 700 or above
- Down payment typically 10–20%
- Cash reserves equal to at least 10% of the loan amount are usually required
- Debt-to-income ratio must generally stay below 45%
These loans make sense for high-income buyers with strong credit purchasing expensive properties.
Government-Insured Mortgages
The federal government doesn’t lend directly, but three agencies back loans made by approved lenders:
FHA loans (Federal Housing Administration):
- Down payment as low as 3.5% with a 580+ FICO score
- A 500–579 FICO may qualify with 10% down
- Require both an upfront mortgage insurance premium and annual premiums
- Good for buyers with limited savings or blemished credit
VA loans (U.S. Department of Veterans Affairs):
- Available to active-duty service members, veterans, and eligible surviving spouses
- No down payment or PMI required
- A funding fee applies in most cases (can be rolled into the loan)
- Closing costs are capped; excess costs can often be paid by the seller
USDA loans (U.S. Department of Agriculture):
- For low-to-moderate income buyers in USDA-designated rural and suburban areas
- No down payment required for eligible borrowers
- Income and property location eligibility requirements apply
Government-backed loans are generally the best fit for buyers who don’t qualify for conventional financing.
Beyond these standard categories, a few specialized structures exist for specific situations: a no-doc mortgage for self-employed or hard-to-document income, a reverse mortgage for homeowners 62 and older who want to tap equity, and HARP-replacement refinance programs for underwater borrowers. Once your loan is paid off, the lender records a satisfaction of mortgage to clear the lien from the title.
Minimum down payment and credit score by mortgage type
Fixed-Rate Mortgage
The interest rate stays constant for the life of the loan — 15, 20, or 30 years are the most common terms. Your principal-and-interest payment never changes, making budgeting straightforward. The trade-off: fixed rates are usually higher than the initial rate on an adjustable-rate mortgage, and it takes longer to build equity on a longer term.
Best for: buyers who plan to stay in the home long-term and want payment predictability.
Adjustable-Rate Mortgage (ARM)
An ARM starts with a fixed rate for an introductory period, then adjusts periodically based on a market index (such as the Secured Overnight Financing Rate, or SOFR, which replaced LIBOR). A 5/1 ARM, for example, is fixed for five years, then adjusts annually.
- Initial rate is typically lower than comparable fixed-rate loans
- Rate — and payment — can rise substantially after the fixed period
- Adjustment caps limit how much the rate can move in a given period
Best for: buyers who plan to sell or refinance before the fixed period ends.
Other Mortgage Structures
- Interest-only mortgage: You pay only interest for a set period; the full principal is due at maturity or when you sell/refinance.
- Standard variable rate (SVR): The lender sets — and can change — the rate freely. Borrowers often land on an SVR after an introductory deal expires.
- Discounted rate: An SVR with a set discount applied for a fixed period.
- Flexible mortgage: Allows overpayments, underpayments, or payment holidays, usually in exchange for a higher base rate.
How to Find and Apply for a Mortgage
Mortgage offers come from banks, credit unions, non-bank lenders, and mortgage brokers. Because terms vary widely, shopping multiple lenders is worth the effort.
Before you apply:
- Check your credit. Pull your credit reports from all three bureaus and dispute any errors. A higher score means better rates and more options — if you’re starting with thin credit, how to build credit from scratch lays out the fastest legitimate routes.
- Know your loan type. Narrow down which category fits your situation (conventional, FHA, VA, etc.). First-time buyers should also check state programs for first-time home buyers, which can cut your down payment.
- Compare lenders. Get quotes from at least two or three sources and ask the right questions. We’ve reviewed several online-first lenders to compare against your local bank — Better Mortgage, AmeriSave, Movement Mortgage, New American Funding, and Sebonic Financial.
- Get pre-approved. A pre-approval — which involves submitting financial documents and a formal credit check — carries more weight with sellers than a prequalification estimate.
- Organize your paperwork. Expect requests for W-2s, pay stubs, bank statements, and tax returns.
The application process:
- Complete the Uniform Residential Loan Application (or its digital equivalent) covering your income, assets, debts, employment, and the property.
- Review your Loan Estimate — a standardized form that shows projected rate, monthly payment, closing costs, and key five-year figures.
- Respond promptly to any underwriter requests for additional documentation.
- At closing, review the Closing Disclosure (sent at least three business days before closing) and confirm the final numbers match your Loan Estimate.
Common Mortgage Questions
Prequalification vs. Pre-approval — what’s the difference?
Prequalification is a quick, informal estimate based on self-reported income and assets. It doesn’t require document verification and doesn’t guarantee approval.
Pre-approval involves submitting actual financial documents and undergoing a hard credit inquiry. It results in a conditional commitment from the lender for a specific loan amount and is far more persuasive to sellers.
What is loan-to-value (LTV)?
LTV is the loan amount divided by the home’s purchase price or appraised value, expressed as a percentage. A $200,000 loan on a $500,000 home is a 40% LTV. Lower LTV generally means better rates and fewer requirements.
What does “locking a rate” mean?
A rate lock guarantees your interest rate for a specified period (often 30–60 days) while your loan processes. Longer lock periods typically cost more. If you’re nervous about rates rising before closing, ask your lender about lock options.
How much can I borrow?
Key factors include your debt-to-income (DTI) ratio, credit score, verified assets, and the property’s value. Most conventional lenders prefer a DTI below 43–45%. Our dedicated guides on how much you can borrow for a mortgage and how much house you can afford under the 28/36 rule work through the math.
Is buying better than renting?
It depends on your timeline, local market, financial situation, and personal priorities. There are genuine benefits to both — homeownership builds equity and may offer tax advantages (consult a tax advisor), while renting provides flexibility and predictable short-term costs.
This article is for educational purposes only and does not constitute personalized financial or mortgage advice. Consult a licensed mortgage professional before making any lending decisions.