Buying or refinancing commercial real estate starts with one question - how much will the monthly payment be? A commercial property calculator helps you answer that question quickly by estimating your principal and interest payment based on your loan amount, interest rate, and amortization term. Whether you are purchasing an office building, retail center, industrial warehouse, or multifamily property, understanding your projected payment is the first step toward making a confident investment decision.

In this guide, we break down how commercial mortgage payments work, what factors affect your monthly cost, and how to estimate payments for different loan types. We also include sample payment calculations at multiple loan amounts and rate levels so you can benchmark your own deal.

How Do Commercial Mortgage Payments Work?

Commercial mortgage payments work by combining principal repayment and interest charges into a regular monthly payment, calculated based on an amortization schedule that spreads the loan balance over a set number of years. Unlike residential mortgages that typically use 30-year fully amortizing structures, commercial loans almost always involve a shorter loan term paired with a longer amortization period - creating what is known as a balloon payment at maturity.

Here is how the math works. When you take out a $1,000,000 commercial loan at 7.00% with a 25-year amortization and a 10-year term, your monthly payment is calculated as if you will pay the loan off over 25 years. That gives you a predictable monthly payment of roughly $7,068. However, after 10 years, the remaining balance (approximately $783,000) becomes due as a balloon payment. At that point, most borrowers either refinance into a new loan or sell the property.

The amortization schedule is the key document that shows how each payment splits between principal and interest. In the early years, the majority of each payment goes toward interest. Over time, the principal portion increases. For a $1 million loan at 7.00% amortized over 25 years, the first monthly payment allocates approximately $5,833 to interest and only $1,235 to principal.

Commercial permanent loans typically use this balloon structure with 5-year, 7-year, or 10-year terms. SBA 504 loans are one of the few commercial options that offer fully amortizing terms up to 25 years, which means no balloon payment at maturity.

What Factors Affect Your Commercial Loan Payment?

Four primary factors determine your commercial loan payment: the interest rate, loan amount, amortization period, and loan term. Adjusting any one of these variables can significantly change your monthly cost and total interest paid over the life of the loan.

Interest rate is the single biggest driver of your payment amount. As of February 2026, commercial real estate financing rates range from approximately 5.18% to 8.75% for conventional loans, with bridge and hard money loans reaching 9% to 12% or higher. A 1% rate increase on a $1 million loan adds roughly $600 to $700 per month to your payment.

Loan amount is determined by the property value and the lender's loan-to-value (LTV) ratio. Most commercial lenders cap LTV between 65% and 80%, depending on property type. A $2 million property at 75% LTV produces a $1.5 million loan amount.

Amortization period controls how quickly you pay down principal. Longer amortization means lower monthly payments but more total interest. Commercial loans typically amortize over 20 to 30 years, though some shorter-term products use 15 or 20-year schedules.

Loan term determines when the loan matures and the balloon payment comes due. Shorter terms (5 years) mean you will refinance sooner but may get better rates. Longer terms (10 years) provide more stability but sometimes carry slightly higher rates.

Other factors that indirectly affect your payment include your DSCR (debt service coverage ratio), credit score, property condition, and tenant quality. Lenders use DSCR - the ratio of net operating income to annual debt service - to determine whether you qualify. Most lenders require a minimum DSCR of 1.20x to 1.25x, meaning the property must generate at least 20% to 25% more income than the annual loan payment.

Try our DSCR calculator to see whether your property's income supports the payment amount you are targeting.

How Do You Estimate Payments for Different Loan Types?

You estimate payments for different loan types by adjusting the rate, amortization, and payment structure in your calculator to match the specific loan product. Fixed-rate loans, variable-rate loans, and interest-only loans each produce different monthly payment amounts - even at the same loan balance.

Fixed-Rate Loans

Fixed-rate commercial mortgages lock your interest rate for the entire term, typically 5 to 10 years. Your monthly payment stays the same throughout, making budgeting straightforward. For a $1 million loan at 7.00% amortized over 25 years, the monthly payment is $7,068 every month for the full term.

Variable-Rate Loans

Variable-rate (or adjustable-rate) loans tie your interest rate to a benchmark index like SOFR (Secured Overnight Financing Rate) plus a spread. If SOFR is 4.30% and your spread is 2.50%, your initial rate is 6.80%. The payment adjusts as the index moves - up or down. Variable-rate loans often start with lower rates than fixed loans, but your payment could increase if rates rise. Many variable-rate commercial mortgages include rate caps that limit how much the rate can increase per adjustment period or over the life of the loan, providing some protection against extreme rate spikes.

Interest-Only Loans

Interest-only (IO) loans require you to pay only the interest each month for a set period, with no principal reduction. A $1 million loan at 7.00% interest-only costs $5,833 per month - about $1,235 less than the fully amortizing payment. However, your loan balance does not decrease during the IO period, and you will face a larger balloon or must begin amortizing payments later. IO periods typically last 1 to 5 years on commercial loans.

Bridge loans frequently use interest-only payment structures because they are designed as short-term financing (12 to 36 months) while you renovate, stabilize, or reposition a property.

What Does a Monthly Payment Look Like at Different Loan Amounts?

Monthly payments scale proportionally with loan amount, but the relationship between rate, term, and total cost becomes more impactful at higher balances. A small rate difference that adds $300 per month on a $500,000 loan adds $3,000 per month on a $5 million loan.

The table below shows estimated monthly payments (principal and interest) for several common commercial loan amounts, using a 25-year amortization and current rate ranges. These figures assume fully amortizing payments with no interest-only period.

As you can see, the payment differences between rate tiers are substantial. On a $2 million loan, the spread between 6.00% and 8.00% is $2,561 per month - or $30,732 per year. That difference directly impacts your property's cash flow and DSCR.

To run your own numbers, use our commercial mortgage calculator. You can enter your specific loan amount, estimated rate, and amortization period to see your projected payment instantly.

How Do You Calculate Total Interest Paid Over the Loan Term?

You calculate total interest by multiplying your monthly payment by the number of payments during the loan term, then subtracting the principal paid during that period. The result shows how much you pay the lender above and beyond the original loan balance.

For example, on a $1,000,000 loan at 7.00% with a 25-year amortization and a 10-year term, the math works like this. Your monthly payment is $7,068. Over 10 years (120 payments), you pay a total of $848,160. During that time, approximately $217,000 goes toward principal, which means roughly $631,160 goes to interest alone.

The amortization period has a major impact on total interest. The same $1 million loan amortized over 20 years instead of 25 has a higher monthly payment ($7,753 vs. $7,068), but you pay down principal faster and owe less at maturity. Here is how total interest compares across amortization periods for a $1 million loan at 7.00% over a 10-year term.

Shorter amortization reduces total interest cost and lowers your balloon balance, but it increases your monthly payment and may tighten your DSCR. Work with your lender to find the right balance between monthly cash flow and long-term cost.

Want to explore different scenarios? Our commercial bridge loan calculator is built specifically for shorter-term financing with interest-only options.

What Steps Should You Follow to Estimate Your Commercial Loan Payment?

Follow these five steps to estimate your commercial loan payment accurately: gather your property and loan details, select the right loan type, input your numbers into a calculator, review the amortization schedule, and verify your DSCR. Each step builds on the previous one to give you a complete picture of your financing cost.

Step 1 - Determine your loan amount. Start with the property's purchase price or appraised value. Apply the lender's LTV ratio (typically 65% to 80%) to calculate the maximum loan amount. For a $1.5 million property at 75% LTV, your loan amount is $1,125,000.

Step 2 - Identify your likely interest rate. Check current commercial mortgage rates for your property type. Multifamily properties generally get the lowest rates, while specialty assets like hotels or restaurants carry higher rates. As of February 2026, expect 5.18% to 8.75% for conventional commercial loans.

Step 3 - Choose your amortization period. Select 20, 25, or 30 years depending on your cash flow needs. Longer amortization means lower payments but more interest over time.

Step 4 - Run the calculation. Enter your loan amount, rate, and amortization into a commercial property calculator. Review both the monthly payment and the amortization breakdown to understand how much goes to principal versus interest.

Step 5 - Check your DSCR. Divide your property's net operating income (NOI) by the annual debt service (monthly payment times 12). You need at least 1.20x to 1.25x to qualify with most lenders. If your DSCR is below the minimum, consider a longer amortization, a smaller loan amount, or an interest-only period to reduce the payment.

Contact Clearhouse Lending to get a personalized rate quote and payment estimate for your specific property and financial situation.

How Do Closing Costs Affect Your Total Loan Cost?

Closing costs add 2% to 5% of the loan amount on top of your principal and interest payments, making them an important factor in your total financing cost. These upfront expenses include origination fees, appraisal fees, title insurance, environmental reports, legal fees, and lender-required reserves.

On a $1 million commercial loan, closing costs typically range from $20,000 to $50,000. Some of these costs - like origination fees (typically 0.5% to 1.0% of the loan amount) - are paid at closing, while others may be rolled into the loan balance. Keep in mind that closing costs scale with loan size, so a $3 million deal may carry $60,000 to $150,000 in total closing expenses. Lenders may also require reserves equal to several months of debt service payments held in escrow, which adds to your upfront capital requirement.

For a detailed breakdown of what to expect, read our guide on commercial loan closing costs. Understanding these expenses upfront helps you budget accurately and avoid surprises at the closing table.

When using a commercial property calculator, remember that the monthly payment shown covers only principal and interest. Your actual monthly carrying cost will also include property taxes, insurance, and any required escrow deposits. Factor these into your cash flow analysis alongside the loan payment.

What Are the Most Common Questions About Commercial Property Calculators?

What is the formula for calculating a commercial mortgage payment?

The standard formula is M = P[r(1+r)^n] / [(1+r)^n - 1], where M is the monthly payment, P is the principal loan amount, r is the monthly interest rate (annual rate divided by 12), and n is the total number of payments (amortization in years times 12). For a $1 million loan at 7.00% over 25 years, r = 0.005833 and n = 300, producing a monthly payment of $7,068.

How accurate are online commercial property calculators?

Online calculators provide reliable estimates for principal and interest payments based on the inputs you provide. However, they do not account for variable closing costs, property taxes, insurance, or lender-specific pricing adjustments. Use calculator results as a starting point, then get a formal quote from a lender like Clearhouse Lending for exact numbers.

What is a typical monthly payment on a $1 million commercial loan?

At current rates (February 2026), a $1 million commercial loan at 7.00% with a 25-year amortization produces a monthly payment of approximately $7,068. At 6.00%, the payment drops to $6,443. At 8.00%, it rises to $7,718. The exact amount depends on your rate, amortization, and whether the loan includes an interest-only period.

Should I choose a longer or shorter amortization period?

A longer amortization (25 to 30 years) gives you lower monthly payments and better cash flow, which is helpful for properties with thinner margins. A shorter amortization (15 to 20 years) means higher payments but faster equity build-up and less total interest. The right choice depends on your property's NOI, your investment timeline, and your DSCR requirements.

How does an interest-only period change my payment?

An interest-only period reduces your monthly payment during that time because you are not paying any principal. On a $1 million loan at 7.00%, the interest-only payment is $5,833 per month, compared to $7,068 for a fully amortizing payment. The trade-off is that your loan balance does not decrease, and you will either face a larger balloon payment or higher amortizing payments when the IO period ends.

Can I use a commercial property calculator for SBA loans?

Yes, you can use a standard commercial property calculator for SBA loans by entering the appropriate rate and term. SBA 504 loans currently offer rates around 5.5% to 6.5% with fully amortizing terms up to 25 years. SBA 7(a) loans have variable rates and shorter terms. Our commercial mortgage calculator works for both SBA and conventional loan types.

What Is the Bottom Line on Using a Commercial Property Calculator?

A commercial property calculator is an essential tool for any investor evaluating a purchase, refinance, or new development. By understanding how interest rates, amortization periods, and loan structures affect your monthly payment, you can make smarter financing decisions and negotiate better terms.

The key takeaways from this guide are straightforward. Commercial loan payments depend on four main factors - rate, loan amount, amortization, and term. Small rate changes produce large payment differences at higher loan balances. Interest-only periods lower initial payments but do not reduce your loan balance. And your DSCR determines whether you actually qualify for the payment structure you want.

Remember that a commercial property calculator gives you estimates based on the inputs you provide. Actual loan terms will vary based on your credit profile, property type, market conditions, and the specific lender you work with. The best approach is to run multiple scenarios at different rate and amortization levels so you understand the full range of possible payment outcomes before you commit to a deal.

Use our free commercial mortgage calculator to run scenarios for your specific deal. When you are ready to move forward, contact the Clearhouse Lending team to get a customized rate quote and payment estimate tailored to your property, your financials, and your investment goals.

Frequently Asked Questions

What are current commercial property calculator rates?

Current rates for commercial property calculator typically range from 5.5% to 12%, depending on the loan type, property condition, borrower creditworthiness, and market conditions. Fixed-rate options generally start around 6.5% while variable-rate products may offer lower initial rates. Contact a lender for a personalized rate quote based on your specific deal.

What are the qualification requirements for commercial property calculator?

Qualification requirements typically include a minimum credit score of 650-680, a debt service coverage ratio (DSCR) of 1.20x to 1.25x, and a down payment of 15-25% of the property value. Lenders also evaluate the borrower's experience, property condition, and market fundamentals. Some programs like SBA loans have additional requirements including business operating history.

How much down payment is needed for commercial property calculator?

Down payment requirements for commercial property calculator typically range from 10% to 30% of the property purchase price or project cost. SBA loans may require as little as 10-15%, while conventional commercial mortgages usually need 20-25%. Bridge loans and construction financing often require 20-30% equity. Your down payment amount directly affects your interest rate and loan terms.

How long does it take to close on commercial property calculator?

The closing timeline for commercial property calculator varies by loan type. SBA loans typically take 60-90 days, conventional commercial mortgages close in 30-60 days, and bridge loans can close in as little as 10-21 days. The timeline depends on the complexity of the transaction, appraisal scheduling, and the completeness of your documentation package.

What DSCR do lenders require for commercial property calculator?

Most lenders require a minimum debt service coverage ratio (DSCR) of 1.20x to 1.25x for commercial property calculator. This means the property's net operating income must be at least 1.20 to 1.25 times the annual debt service. Some programs accept a DSCR as low as 1.0x for strong borrowers, while others may require 1.30x or higher for riskier assets.