Banks decide the interest rate they offer you by combining five inputs: the Federal Reserve’s benchmark rate, your credit profile, the structure and collateral of the loan, the bank’s own cost of doing business, and how hard other lenders are competing for the same borrowers. As of early 2026, the federal funds rate sits at 3.50–3.75%, 30-year fixed mortgages average around 5.98%, and 15-year fixed mortgages average about 5.44%.1Freddie Mac. Primary Mortgage Market Survey The rate you personally receive depends on how each of those five factors applies to you.
The Fed Sets the Floor
Every consumer interest rate traces back to the Federal Reserve. Federal law directs the Fed to manage monetary and credit conditions to promote maximum employment, stable prices, and moderate long-term interest rates.2Office of the Law Revision Counsel. 12 USC 225a – Maintenance of Long Run Growth of Monetary and Credit Aggregates Its main lever is the federal funds rate, the rate banks charge each other for overnight loans. When the Fed moves that rate, commercial banks move their prime rate, and the prime rate is the baseline for many consumer products.
Whether Fed changes reach you quickly depends on your loan type. If you carry a variable-rate product like an adjustable-rate mortgage, a HELOC, or a credit card, a rate change can appear in your next billing cycle. Fixed-rate loans lock in a rate at closing and don’t move.
Your Credit Profile Does the Heavy Lifting
Your own financial history usually explains the biggest gap between the rate you’re offered and the rate someone else gets. Banks use your credit file to predict how likely you are to repay, and they charge more to borrowers who look riskier.
Credit Reports and Risk-Based Pricing
Under the Fair Credit Reporting Act, lenders can pull your credit report from the major bureaus when you apply for credit or when they review an existing account.3Office of the Law Revision Counsel. 15 USC 1681b – Permissible Purposes of Consumer Reports What’s in that report — payment history, outstanding balances, length of credit history, mix of accounts — becomes a risk grade. A borrower with missed payments or high balances typically pays several percentage points more than someone with a clean file. Banks call this risk-based pricing.
Shopping multiple lenders won’t hurt you the way people sometimes assume. Credit scoring models treat all mortgage-related inquiries within a 45-day window as a single inquiry, so you can gather offers without stacking up damage to your score.4Consumer Financial Protection Bureau. What Happens When a Mortgage Lender Checks My Credit
Debt-to-Income Ratio
Beyond the score itself, banks look at your debt-to-income (DTI) ratio: the share of your gross monthly income already going to existing debt. Lower DTI signals room to absorb a new payment, and lenders reward that with better pricing. There’s no universal cutoff, but many lenders treat ratios above roughly 43% as a warning sign. The Consumer Financial Protection Bureau originally set 43% as the maximum DTI for “qualified mortgages” under federal lending rules, though that hard cap has since been replaced with price-based thresholds.5Consumer Financial Protection Bureau. General QM Loan Definition A DTI well below 43% still strengthens your position with most lenders.
The Loan Itself: Collateral, Size, and Term
The shape of the loan changes what a bank is willing to charge. Three features matter most.
Secured vs. Unsecured
Secured loans are backed by collateral like a house or a car that the bank can claim if you stop paying. Because the lender has a fallback, secured loans carry lower rates. Unsecured loans, such as credit cards and most personal loans, give the bank no such recourse, and the rate reflects that higher risk of total loss.
Loan-to-Value and Down Payment
For mortgages and other secured loans, the loan-to-value (LTV) ratio — the amount borrowed divided by the appraised value of the asset — directly affects your rate. A larger down payment produces a lower LTV, which the lender reads as less risk and typically prices at a lower rate.6Consumer Financial Protection Bureau. What Is a Loan-to-Value Ratio and How Does It Relate to My Costs Putting down at least 20% on a conventional mortgage also avoids private mortgage insurance and often unlocks a better rate on top of that.
Loan Term
The longer the term, the longer the bank’s money is exposed to economic uncertainty, so longer loans carry higher rates. That’s why the 30-year fixed mortgage averages 5.98% while the 15-year averages 5.44%, a gap of more than half a point.1Freddie Mac. Primary Mortgage Market Survey The shorter loan costs less in total interest but comes with a bigger monthly payment.
Discount Points
You can also buy the rate down at closing by paying discount points. One point costs 1% of the loan amount, so one point on a $350,000 mortgage is $3,500, and it lowers your rate by an amount that varies by lender and market. Paying points pays off only if you keep the loan long enough for the monthly savings to overtake the upfront cost, so ask the lender to show you the break-even math before agreeing.
The Bank’s Own Costs
Even after the Fed’s benchmark and your risk are priced in, the bank still has to cover itself and earn a margin.
Cost of Funds
Banks fund most loans with depositor money. If a bank pays 4.00% on savings and certificates of deposit, it has to charge more than 4.00% on loans or it loses money on every dollar out the door. The gap between what a bank pays for capital and what it earns on loans is the spread, and it’s the core of the lending business. When deposit rates rise industry-wide, loan rates follow.
Overhead
Salaries, branches, cybersecurity, compliance, and technology all get built into the rate. Lenders with lower overhead, such as online-only banks with no branch network, can sometimes pass those savings through as lower rates, which is one reason internet lenders often undercut traditional banks.
Relationship Discounts
Some banks reduce rates for existing customers who keep deposit or investment balances above certain thresholds. If you already have significant money at the bank, ask about relationship pricing before you sign. The discount can run from an eighth to a half of a percentage point depending on the institution and your balances.
Competition and Rate Locks
Two lenders can look at the same borrower and quote noticeably different rates, because each is deciding how aggressively to chase new business at that moment. That’s why the single most reliable way to lower the rate you actually pay is to collect competing offers. The 45-day scoring window makes it practical to do that without stacking inquiries against your score.4Consumer Financial Protection Bureau. What Happens When a Mortgage Lender Checks My Credit
Once you find a rate you want, you can ask for a rate lock, which freezes the quote for a set period while you finish the loan. Locks are commonly available for 30, 45, or 60 days.7Consumer Financial Protection Bureau. What’s a Lock-in or a Rate Lock on a Mortgage If closing slips past the lock expiration, the rate isn’t guaranteed anymore and extending often costs extra. Ask your lender upfront what happens if the timeline moves.
Interest Rate vs. APR
When you compare offers, don’t compare interest rates alone. The interest rate is the cost of borrowing expressed as a percentage of the principal. The APR folds in lender fees like origination charges, so it shows what the loan actually costs per year.8Consumer Financial Protection Bureau. What Is the Difference Between a Loan Interest Rate and the APR Two lenders can advertise the same interest rate, but if one charges higher fees, its APR is higher and the loan is more expensive. Compare APR to APR.
What Banks Can’t Base Your Rate On
Banks have wide discretion to price loans based on financial risk, but federal law draws hard lines around what they can’t consider. The Equal Credit Opportunity Act makes it illegal for a creditor to set different rates or terms based on race, color, religion, national origin, sex, marital status, or age. Lenders also can’t penalize you for receiving public assistance income or for exercising your rights under consumer credit protection laws.9Office of the Law Revision Counsel. 15 USC 1691 – Scope of Prohibition
For mortgages, the Fair Housing Act adds another layer. Federal regulations prohibit lenders from setting different interest rates, loan durations, or other terms for housing-related financing because of race, color, religion, sex, disability, familial status, or national origin.10eCFR. Part 100 – Discriminatory Conduct Under the Fair Housing Act If you think a lender offered you worse terms on any of those grounds, you can file a complaint with the Consumer Financial Protection Bureau or the Department of Housing and Urban Development.
Legal Caps on Rates
Most states have usury laws that ceiling the interest rate a lender can charge. The caps vary widely: some states cap certain loan types at 5–6%, while others permit rates above 30%, and many use formulas tied to federal indexes rather than a single fixed number. The cap also depends on the product, whether it’s a personal loan, an auto loan, or a mortgage.
Federally chartered national banks play by a different rule. Federal law lets a national bank charge interest at the rate permitted by the state where the bank is located, no matter where the borrower lives.11Office of the Law Revision Counsel. 12 USC 85 – Rate of Interest on Loans, Discounts and Purchases A bank headquartered in a state with generous limits can lend nationwide at those higher rates. Federal law also preempts state usury caps entirely for first-lien residential mortgages originated after March 31, 1980.12eCFR. Part 190 – Preemption of State Usury Laws The practical protection a usury law offers you depends on the type of loan and whether the lender holds a state or federal charter.