Business Loan Calculator

Business Loan Calculator: Estimate Your Monthly Payments & Total Loan Cost

Use our free business loan calculator to calculate your monthly payment, total interest and total cost of repayment in seconds. Just enter your loan amount, interest rate and term below. No registration required.

How Does a Business Loan Calculator Work?

You tell a business loan calculator how much you want to borrow, how much interest you want to pay, and how long you have to pay it back. It then figures out how much you’ll have to pay each month. That math would have taken a spreadsheet and a lot of time to do by hand.

During each payment, the tool automatically splits the loan amount plus interest into equal parts, so you always know how much money is leaving your business account each month. This is how banks and online lenders make their own repayment plans, which is why the numbers you see here should be very close to what a lender gives you (small changes are usually due to fees, which we’ll talk about later).

What Information You Need Before You Calculate

Before you start using a reliable business loan calculator, have these four numbers ready:

• Loan amount: how much money you intend to borrow
• Interest rate or APR – the cost of borrowing annually as a percentage
• Loan term: The months or years you’ll be paying it back
• Payment frequency: monthly, weekly or bi-weekly depending on your lender.

If you don’t have exact numbers yet, make a plausible approximation. Once you’ve got an official quote from a lender, you can always come back and re-run the calculator.

How We Calculate Your Results (Methodology & Accuracy Note)

The conventional amortisation formula banks, credit unions and the U.S. Small Business Administration employ for term loans is the basis for this business loan calculator we have designed. We validated our method and examples against rate disclosures from the SBA and, for our UK content, the FCA to make sure the math fits up with real-world lending practice.

The calculator does not incorporate any hidden fees or assumptions. What you put in is what you get out. Your actual cost will be higher than the sum displayed here if your actual loan has an origination fee, a documentation fee or a prepayment penalty. We’ll explore how to account for that later in this article.

Business Loan Calculator Formula (Step-by-Step)

Knowing the formula behind the figures helps you trust the result and discover errors if a lender’s quote looks wrong.

The Standard Amortization Formula

Most term loans use this formula to work out a fixed monthly payment:

M = P × [r(1+r)^n] / [(1+r)^n − 1]

Where:

• M = Monthly payment
• P = Principal (the loan amount)
• r = Monthly interest rate (your annual rate divided by 12)
• n = Total number of payments (loan term in months)

This formula is designed such that every payment initially goes towards that month’s interest, and the rest goes towards paying down your debt. As time goes by, a less and smaller portion of your payment is applied to interest, and a larger and larger portion is applied to principal. This is what you see in the amortisation schedule.

Worked Example: Calculating a $50,000 Loan

Let’s say you borrow $50,000 at a 9% APR, to be returned over 5 years (60 months). 

• Step 1: Find the monthly interest rate (r) 9%/12 = 0.75% or 0.0075 as a decimal
• Step 2: Find the number of payments (n) 5 years x 12 months = 60 payments.
• Step 3: Input the integers into the formula M = 50,000 × [0.0075(1.0075)^60] / [(1.0075)^60 − 1]
• Step 4: Solve it That works out to a monthly payment of about $1,038.
• Step 5: Calculate your total interest ($1,038 × 60) – $50,000= $12,280 total interest over the life of the loan.
• Step 6: Your total repayment $50,000 + $12,280 = $62,280 paid back in total.

This is exactly the kind of breakdown that the above calculator produces instantly. The manual version only shows you where each number comes from.

How to Calculate Interest if Your Loan Uses a Factor Rate

Some company loans do not have interest rates. Instead, many short-term goods like merchant cash advances use a factor rate, which is a decimal amount like 1.2 or 1.4 (vs. a percentage).

The formula is substantially easier:

Total Repayment = Principal × Factor Rate

Say you borrowed $20,000 at a factor rate of 1.3. Regardless of how quickly you pay it back, you owe $20,000 × 1.3 = $26,000 overall.

A factor-rate loan is considerably different from an amortizing loan and typically more expensive when you calculate the true yearly cost. The cost doesn’t go down if you pay it off early.

Total Interest Formula

To find the total interest paid on any amortising loan after you know the monthly payment:

Total Interest = (Monthly Payment × Number of Payments) − Principal

Business Loan Payment Calculator: Understanding Your Monthly Payment

Your monthly payment isn’t solely based on what you borrow. It moves up or down for a number of reasons.

What Affects Your Monthly Payment

The larger the loan amount, the larger the payment (everything else equal).

• Interest rate: just 1-2% can vary your payment by hundreds of dollars during the life of the loan
• Loan length: The longer the term, the smaller your monthly payment, but the higher your total interest paid
• Payment frequency: If you pay bi-weekly or weekly, you will pay off your principal faster which somewhat reduces the total interest paid
• Fees added to the loan: If fees are added to the loan rather than paid up front, they increase your principal and your payment

Fixed-Rate vs. Variable-Rate Payments

A fixed-rate loan means the interest rate stays the same throughout the period, therefore your payment stays the same. This makes budgeting easy and predictable.

A variable-rate loan is related to a benchmark rate (such as the prime rate or SOFR) that fluctuates over time. Your payment may go up or down during the life of the loan. Variable rates usually start lower than fixed rates, but they involve additional risk if rates go up. Always ask a lender if the rate mentioned is fixed or variable while comparing offers.

Small Business Loan Calculator: What Makes It Different

A small business loan calculator uses the same logic as any loan calculator, but small business loans may have some additional elements that are good to know.

What to Know With an SBA Loan Calculator

SBA loans (such as the 7(a) or 504 programmes) are partially backed by the government and sometimes have cheaper rates and longer durations than a standard bank loan. However, SBA loans do include a guarantee charge that is separate from the interest and can add a substantial amount to your total cost. SBA loan, add the guarantee charge separately after you compute the base amortisation to discover your exact total cost

Microloans, Term Loans & Lines of Credit

• Microloans are small loans, usually less than $50,000 and they amortise the same as the method above.
• Term loans are the conventional lump sum loan with fixed monthly installments. This calculator is designed for this product.
• A line of credit is different. You only pay interest on the amount you actually use, not the entire credit limit. If you use a term loan calculator on a line of credit, you will overstate your cost. You should use a specialist line-of-credit calculator.

Business Property Loan Calculator (Commercial Real Estate)

A business property loan calculator (also known as a commercial real estate loan calculator) uses the identical amortisation formula, but with one twist that most ordinary business loans don’t have.

Key Differences from a Standard Term Loan Calculator

Commercial property loans also usually have longer amortisation periods (20 to 25 years), but shorter actual loan durations (5 to 10 years), so you’re not paying off the loan in the term you agree to. Down payment requirements are usually greater, too, generally 10 to 30 percent of the value of the home, which changes your principal and consequently your payment.

Scenarios: Balloon Payment and Amortisation

Commercial property loans usually “balloon” – that is, they conclude with a high lump-sum payment of whatever principal remains at the end of the term. For example, a debt could be amortised over 25 years but be due in 10 years. When you calculate a commercial property loan, always check if your term matches your amortisation period or if you will have a balloon payment that the calculator’s monthly figure does not reflect.

Business Car Loan Calculator (Vehicle & Equipment Financing)

A business auto loan calculator will estimate payments on vehicles or equipment utilised for your company, and it employs the same basic formula as any term loan.

How Your Equipment/Vehicle Collateral Affects Your Rate

Lenders sometimes provide cheaper rates than an unsecured company loan, as the vehicle or piece of equipment itself is used as collateral. The asset is something that the lender can take back if you don’t pay. Your rate will also be based on the age and resale worth of the equipment; newer assets that have a strong resale value tend to get better terms.

Lease vs. Loan: Which Calculator Should You Use

If you are financing to eventually acquire the vehicle or equipment, a loan calculator (like the one on this site) is the perfect instrument. If you are leasing, that will be returning the asset at the end of the term, you will need a lease calculator instead. Leases are based on depreciation and a money factor, not a conventional amortisation calculation.

Business Loan Calculators by Region

Loan structures, transparency rules and typical rates differ from country to country. If you’re borrowing abroad, here’s what you need to know.

Business Loan Calculator Australia: Rates, Lenders & Regulations

ASIC regulates small business lending in Australia to some extent, and there are several tools on the business.gov.au website that provide broad advise about comparing credit options. Banks and non-bank lenders have a variety of rates and product structures available, so always check the latest published rates with your lender directly or on business.gov.au before you make a final choice.

Business Loans UK Calculator: Rates, Lenders & Rules

The Financial Conduct Authority (FCA) is a regulator that establishes regulations on how lenders must disclose rates and terms, and it regulates UK business lending to some extent. Lenders in the UK tend to issue either a simple annual rate or a representative APR, so it’s worth checking which one you’re being quoted before comparing it to the output of this calculator.

APR vs. Interest Rate: Why Your Calculator Results May Differ from Lender Quotes

The principal is the amount you borrow. The interest rate is the cost of borrowing the principal, represented as a percentage each year. Your APR (Annual Percentage Rate) is the interest rate plus most lender expenses, including origination, documentation, and some closing costs, all added together into one single percentage.

Because APR includes fees and shows the full yearly cost of a loan, it is very rarely less than the basic interest rate. If you computed the interest rate using a calculator but your lender gave you an APR number, your projected payment will be less than the actual payment. Always check carefully to see whatever figure rate or APR you have been provided before comparing offers”.

How to Use Your Results to Compare Lenders

A monthly payment figure is useless unless you know what to do with it. How to turn a calculator result into a smart borrowing decision.

Total Cost of Borrowing (Excluding Monthly Payment)

Depending on the length of the term and fees, two loans may have the same monthly payment but significantly different overall expenses. Always compare: 

• Total interest paid for the life of the loan
• Total paid back (principal+interest+fees)
• Any fees not included in the calculator such as origination, paperwork, or prepayment fees

Generally, a longer term will lower your monthly payment but increase your overall interest. Run the numbers both ways before you decide.

Red Flags: When a “Low Rate” Isn’t Actually Cheap

Watch for these signals that a low headline rate may not indicate a low true price:

• Lenders quote a factor rate but market it as an interest rate; they are not comparable
• Introductory rate – the rate is increased after a certain period
• Increase your principal quietly with loan financing fees
• There is a prepayment penalty that penalises you for paying off the loan early

Common Mistakes When Calculating Business Loan Costs

• Confusing rate and APR: the interest rate a lender really quoted vs the basic interest rate
• Fees you could forget: Origination and paperwork fees can cost thousands and won’t show up on a simple calculator unless you input them
• Confusing factor rates with interest rates, they are calculated using completely different formulae and are not directly similar
• Forget about balloon payments on commercial real estate loans and the big surprise at the end of the term
• Use a term loan calculator for a line of credit which overstates the true cost because you only pay interest on the amount of money you actually draw.