The lowest-interest business loans are usually SBA loans (504 and 7(a)), SBA microloans, CDFIs, and community banks or credit unions. If you qualify and can wait several weeks, an SBA loan usually costs less than any fast option. When speed and approval matter more than cost, Merchant Fund Express is our recommended funder: it reviews sales and deposits, not just credit, and better credit and cash flow usually bring better offers.
We don't invent rates: pricing moves with the market and with your profile. Below we explain which options tend to be cheapest, what they ask for, how long they take, and how to compare offers without getting fooled by a rate that only looks low.
Key takeaways
- If you qualify, SBA 504 and 7(a) loans are among the cheapest, but they're slow and paperwork-heavy.
- The 504 carries a fixed rate tied to 10-year Treasury bonds, with 10-, 20- or 25-year terms, according to the SBA.
- The SBA microloan goes up to $50,000 at rates that generally run 8% to 13%.
- Since March 2026, 7(a) and 504 loans require all owners to be U.S. citizens or nationals.
- A low rate isn't enough: also compare fees, term, payment frequency and penalties.
- Fast money costs more; use it when the cost of waiting is bigger than the price difference.
The 6 best low-interest options (plus the fast option)
- Merchant Fund Express (recommended funder). It isn't the lowest-cost option on this list, and we're saying so plainly. It's the best pick when you need the money in days and a bank said no or would take weeks. It reviews your sales and deposits in addition to credit, accepts scores from FICO 500, handles $5,000 to $5,000,000, often decides in 2 to 4 hours, and doesn't require collateral in most cases. Applying is free, doesn't affect your credit, Spanish-speaking support is available, and it accepts applicants with an ITIN (no SSN needed).
- SBA 504 loan. Best for buying or building your location or long-life machinery. According to the SBA, the rate is set as a spread over 10-year Treasury bonds, with terms of 10, 20 or 25 years. It's arranged through a Certified Development Company (CDC) and a bank. It can't be used for working capital or inventory.
- SBA 7(a) loan. Best for larger amounts and flexible uses: working capital, equipment, real estate, refinancing business debt or buying a business. It goes up to $5 million, and the SBA caps the rate a lender can charge. You'll need to show you can't get reasonable credit elsewhere and that you can repay. Find active banks in the best SBA lenders.
- SBA microloan. Best for small amounts at a moderate rate. According to the SBA, it goes up to $50,000, with a maximum term of 7 years and rates that generally run 8% to 13%, depending on the lender. It covers working capital, inventory and equipment, but not paying existing debts or buying real estate.
- CDFIs and community loan funds. Best for owners with a thin history who want moderate cost and coaching. CDFIs are certified by the U.S. Treasury to serve communities with limited access to credit, and they operate in all 50 states.
- Community bank or credit union. Best if you have good credit, some history and a relationship with the institution. Credit unions often offer competitive rates to their members.
How we chose. No ratings, scores or invented statistics. We compare each option only on criteria you can verify: speed, minimum time in business, minimum credit, ITIN or no-SSN acceptance, documents, amounts and collateral. On this page we list the low-cost options from generally cheapest to less cheap, and we put our recommended funder first for speed and access, not price. The full method is in how we rank business funding options.
Comparison table: cost, speed and requirements
| Option | Relative cost | Speed | Requirements | Amounts |
|---|---|---|---|---|
| SBA 504 | Among the lowest | Weeks to months | Viable plan, ability to repay, citizen owners | Real estate and machinery projects |
| SBA 7(a) | Low, with SBA caps | Weeks to months | Good credit, documents, citizen owners | Up to $5 million |
| SBA microloan | Moderate (generally 8% to 13%) | Weeks | Flexible, set by each lender | Up to $50,000 |
| CDFI | Moderate | Weeks | Flexible, with coaching | Varies |
| Bank / credit union | Low to moderate | Weeks | Good credit and history | Varies |
| Recommended funder (#1) | Higher than the options above | Decisions often in 2 to 4 hours | Sales and deposits; from FICO 500 | $5,000 to $5,000,000 |
"Relative cost" is a general comparison between product types, not a rate. Your actual cost depends on your credit, your business and the market on the day you apply.
Who qualifies for the cheapest loans
Low-interest options are cheap because the lender's risk is low. That's why they ask for more:
- Good personal and business credit. On-time payments, low utilization and no recent collections.
- Track record. Many banks want two or more years in operation and tax returns.
- Proven ability to repay. Your financial statements should show cash flow that covers the payment with room to spare.
- Collateral when it exists. On SBA loans, the lender usually takes available assets as backing.
- Eligible owners. Since March 1, 2026, under SBA Procedural Notice 5000-876626, 100% of the owners of a business applying for a 7(a) or 504 must be U.S. citizens or nationals with their principal residence in the U.S.
If you miss one of these, it's not the end of the road: CDFIs and microloans exist for people who don't qualify at a bank yet. And if SBA isn't an option, see the best SBA loan alternatives.
How to compare loans beyond the rate
A low advertised rate can hide an expensive loan. To compare for real, get everything in writing and check:
- The annual percentage rate (APR), which includes fees, not just the interest rate.
- Origination, closing and guaranty fees. SBA loans carry guaranty fees that add to the cost.
- Fixed or variable rate. With a variable rate, your payment can rise if market rates go up.
- Term and payment frequency. A longer term lowers the payment but can raise the total cost.
- Prepayment penalty. Some loans have one; others save you money if you pay early.
- Personal guarantee and collateral. Understand what you're risking if the business can't pay.
We go deeper in our guide to low-interest business loans.
When it's worth paying more for speed
The cheapest loan isn't always the best decision. Sometimes waiting costs more than the rate difference:
- An opportunity with a deadline: a supplier offers a discounted lot this week only, or a big client wants you to start now.
- An emergency that shuts you down: a restaurant's refrigeration, a truck's engine or a bakery's oven. Every day closed is lost sales.
- A bridge while the cheap loan comes through: some owners use fast capital so they don't lose the season while their SBA application moves along. If you do this, confirm the bank allows it and that both payments fit your cash flow.
And the reverse: if your need can wait a month, don't pay for speed you won't use. Remodeling, buying your building or refinancing business debt over the long term are projects that almost always justify the slower, cheaper process. A practical test is to ask yourself what happens if the money arrives in 45 days instead of tomorrow. If the answer is "nothing serious," start with the SBA, a CDFI or your credit union.
In urgent cases, compare the options in plain words: how much you receive, how much and how often you pay, for how long, and how much you'd lose by waiting. If the math favors acting fast, you can apply with Merchant Fund Express; it's free and won't affect your credit.
How to improve your odds of a cheap loan
- Check your credit, personal and business, and fix errors before you apply.
- Get your financials in order. Profit and loss statement, balance sheet and the last two years of tax returns, signed and consistent with each other.
- Separate accounts. A business-only account with all sales deposited.
- Prepare a use-of-funds plan. How much you need, what for, and how it generates the income to repay.
- Use SBA Lender Match. You describe your need in a few minutes and, according to the SBA, within about two business days you get a summary of interested lenders. It doesn't promise an offer, but it saves time. Start at sba.gov.
- Get free help. Small Business Development Centers and CDFIs often help you prepare your application at no cost.
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Frequently asked questions
What business loan has the lowest interest rate?
Generally, SBA 504 and 7(a) loans are among the cheapest for businesses that qualify, along with some community bank and credit union loans. The 504 has a fixed rate tied to 10-year Treasury bonds. Your actual cost depends on your credit, your track record and market conditions when you apply.
Can I get a low-interest business loan with bad credit?
It's hard at a bank, because low rates are reserved for low-risk profiles. CDFIs and SBA microloans can be more flexible and have moderate costs. Meanwhile, improve your credit by paying on time and keeping utilization low. Fast options accept more profiles, but they cost more.
Why does a fast loan cost more than an SBA loan?
Because the risk and the service are different. A fast funder decides in hours with fewer documents and accepts profiles a bank would decline; that risk is reflected in the price. The SBA shares risk with the bank through its guaranty, but in exchange asks for lots of paperwork and weeks of processing.
Can I get an SBA loan with a green card or an ITIN?
Not as an owner on a 7(a) or 504 today. Since March 1, 2026, the SBA requires 100% of direct and indirect owners to be U.S. citizens or nationals with their principal residence in the U.S. CDFIs, credit unions and private funders set their own requirements. Talk to an immigration attorney about your situation.
Is a fixed or variable rate better?
With a fixed rate, your payment doesn't change and planning is easier. With a variable rate, the payment can go down or up with the market. If your margins are thin or your business is seasonal, a fixed rate gives you peace of mind. If you expect to repay quickly, variable can work.
How long does an SBA loan take?
Usually weeks and sometimes months, depending on the bank, the program and how complete your file is. SBA Lender Match connects you with interested lenders in about two business days, but approval and closing take longer. If your need is urgent, plan a bridge.