The loans with the lowest interest rates are secured loans backed by collateral, federal student loans, and mortgages—in that order of typical rates.

A secured loan uses something you own—a car, house, or savings account—as collateral. If you don't repay, the lender takes the collateral. Because the lender's risk is lower, they charge less interest. A home equity line of credit (HELOC) or a car loan typically carries rates between 4% and 10%, depending on your credit score and how much equity you have.

Federal student loans have fixed rates set by Congress, not by lenders. For the 2024–2025 academic year, undergraduate loans are around 8.5%, and graduate loans around 10.75%. These rates don't change based on your credit score. Private student loans, by contrast, vary widely—often 4% to 14%—and do depend on your credit.

Mortgages are the cheapest long-term borrowing available to most people. Current rates vary by market conditions and your down payment, but a 30-year fixed mortgage typically ranges from 6% to 8%. You're borrowing a large sum over decades, and the house itself secures the loan.

Unsecured loans—personal loans, credit cards, and payday loans—have much higher rates because the lender has no collateral to recover. Credit cards average 18% to 25%. Personal loans from banks or credit unions range from 6% to 36%, depending on your credit and the lender. Payday loans can exceed 400% annually.

Key Takeaways

  • Secured loans backed by collateral (home equity lines, car loans) typically have the lowest rates, usually between 4% and 10%.
  • Federal student loans have fixed rates set by Congress and do not change based on your credit score, making them predictable even if not the absolute lowest.
  • Mortgages offer the cheapest borrowing for large sums because they span decades and the property secures the debt.
  • Unsecured loans like personal loans and credit cards carry much higher rates—often 15% to 36%—because the lender has no collateral to recover if you default.
  • Your credit score, income, and the amount you borrow all affect the actual rate you receive within each loan category.

How your credit score affects the rate you're offered

Lenders use your credit score to decide how much risk you represent. A score above 740 typically qualifies you for the lowest published rate. A score between 670 and 739 usually means a rate 1% to 3% higher. Below 670, rates jump significantly—sometimes 5% to 10% higher than the best offer.

This matters most with unsecured loans, where your creditworthiness is the only protection the lender has. With a secured loan, a lower credit score still raises your rate, but the collateral keeps the increase smaller. A mortgage lender might offer 6.5% to someone with a 750 score and 7.2% to someone with a 650 score on the same property—a difference of 0.7%, not 5%.

If your score is below 620, many traditional lenders won't work with you at all. Credit unions sometimes have more flexible standards, and some offer credit-builder loans specifically designed to help you rebuild while borrowing small amounts at reasonable rates.

Comparing rates across loan types: what to actually look at

Interest rate alone doesn't tell the full cost story. You also need to know the Annual Percentage Rate (APR), which includes fees, and the loan term—how long you have to repay.

A personal loan at 8% APR over 3 years costs far less in total interest than a credit card at 18% APR, even though you're paying off the card slowly. A mortgage at 7% over 30 years builds equity in an asset; a car loan at 6% over 5 years does not. The lowest rate isn't always the best deal if the term is wrong for your situation.

When comparing offers, ask for the APR and the total amount of interest you'll pay over the life of the loan, not just the monthly payment. Some lenders advertise a low starting rate that jumps after a promotional period. Read the fine print for rate adjustments, prepayment penalties, and origination fees.

Where to find the lowest rates in each category

For mortgages, compare at least three lenders: a bank, a credit union, and a mortgage broker. Rates vary by lender and change daily. Get a Loan Estimate from each within the same 3-day window so you're comparing the same day's rates.

For car loans, check your bank or credit union first—they often beat dealership rates. Then get a quote from the dealership to compare. Some credit unions offer car loans to non-members or have special programs for used vehicles.

For personal loans, compare banks, credit unions, and online lenders like LendingClub, Upstart, or SoFi. Rates vary widely, and some specialize in lower credit scores. Get quotes from at least three before deciding. Many lenders let you check your rate without a hard credit pull, so you can shop without damaging your score.

For federal student loans, rates are the same regardless of lender—they're set by law. You borrow directly from the U.S. Department of Education through your school's financial aid office. Private student loans do vary by lender; compare Sallie Mae, Earnin, and your bank.

For home equity lines of credit, contact your current mortgage lender first, then compare banks and credit unions. Rates are usually variable, meaning they change with the prime rate, so ask what the current rate is and what the maximum rate could be.

Why some loans stay cheap even when rates rise

Federal student loans and mortgages can be fixed-rate, meaning your rate never changes. A personal loan or HELOC might be variable, meaning the rate adjusts periodically based on market conditions. Fixed rates protect you from future increases but are usually slightly higher than the starting variable rate.

If you lock in a 7% mortgage when rates are rising, you keep 7% for 30 years. If you take a variable-rate HELOC at 6% and rates climb, your rate might jump to 8% or 9% within months. The trade-off is that variable rates start lower. Choose fixed if you plan to keep the loan for years and want predictability. Choose variable only if you plan to pay it off quickly or can handle rate increases.

Red flags that signal a rate is not actually the lowest

A rate that sounds too good to be true usually is. If a lender advertises 2% on a personal loan but your credit score is 650, that rate is not for you—it's for someone with a 780 score. Read the fine print to see what credit range qualifies for the advertised rate.

Origination fees, prepayment penalties, and balloon payments can hide the true cost. A loan with a 1% lower rate but a $500 origination fee might cost more than a loan with a slightly higher rate and no fee. Calculate the total interest plus all fees over the life of the loan, not just the monthly payment.

Payday lenders and title loan companies advertise fast approval, not low rates. Their rates are almost always above 100% APR and sometimes exceed 400%. These are emergency-only borrowing, not a path to cheap credit.

Frequently Asked Questions

What's the difference between interest rate and APR?

Interest rate is the percentage of the loan amount you pay annually. APR includes the interest rate plus fees, closing costs, and other charges, expressed as an annual percentage. APR is always equal to or higher than the interest rate and gives you a more complete picture of what the loan actually costs.

Can I get a lower rate by paying a larger down payment?

Yes, for mortgages and car loans. A larger down payment reduces the amount you borrow, which lowers the lender's risk, so they often offer a lower rate. For mortgages, putting down 20% instead of 10% can lower your rate by 0.25% to 0.5%. For car loans, the effect is similar but varies by lender.

Do I have to accept the first rate a lender offers?

No. You can negotiate, especially with mortgages and car loans. If you have a competing offer from another lender, bring it to the table. Lenders sometimes match or beat a competitor's rate to keep your business. Always get multiple quotes before accepting any offer.

Is a credit union loan always cheaper than a bank loan?

Often, but not always. Credit unions are member-owned nonprofits and typically have lower overhead, so they can offer lower rates. But rates vary by credit union and by loan type. Always compare at least one credit union quote with at least one bank quote before deciding.

What if my credit score is too low to get approved anywhere?

A credit-builder loan from a credit union is designed for this situation. You borrow a small amount (usually $500 to $1,000), and the lender holds the money in a savings account while you make payments. You build credit history and pay a reasonable rate, typically 8% to 12%. After you repay, you get the money back.