Commercial mortgage requirements explained simply

When you apply for a commercial mortgage, the lender is not asking if you are a good person. They are asking if the property’s cash flow can pay the debt and if you can absorb a loss. That is the entire game. The commercial mortgage requirements start with the property’s net operating income (NOI) and end with your personal balance sheet. A residential lender looks at your credit score and calls it a day. A commercial underwriter looks at a debt service coverage ratio (DSCR) and a loan-to-value (LTV) and then decides whether to even read your tax returns. You need to know which tests matter, what numbers will pass, and where the hidden costs live. Prepare accordingly, not as a sales pitch.

How Underwriters Read the First Filter

Let us break down the property-side tests because they are the first filter. The DSCR is the ratio of NOI to total debt service. A 1.25x DSCR means the property generates 25% more income than the payment. The LTV is the loan amount relative to the property’s value. A 75% LTV is common for a bank loan; a 65% LTV is safer for the lender and gets you a better rate. The debt yield is the NOI divided by the loan amount, expressed as a percentage. It tells the lender what return they would get if they took the property back. A 10% debt yield is the hard floor for CMBS, regardless of DSCR or interest rates. For a small-balance loan under $1 million, the minimum is often higher, around 12% to 14%, because the fixed costs of origination are the same.

What the Lender Checks Beyond the Property

Now the borrower-side tests. A commercial mortgage is not a personal loan, but the lender still wants to see your credit score. A 680 FICO is the floor for most banks; 700 or above is better. But the bigger test is liquidity. You need cash reserves to cover six to twelve months of debt service, on top of the down payment and closing costs. For a $1 million loan, that means $50,000 to $100,000 in liquid reserves. Net worth is also key: you need to be worth at least the loan amount, excluding your primary residence. That is a soft rule, but agencies like Fannie Mae and Freddie Mac enforce it. Experience matters too. A first-time buyer with no landlord history will struggle. The lender wants to see that you have managed a similar property type before. If you have not, bring in a partner who has, or be prepared to put in more equity.

Beyond the Down Payment: Closing Costs and Reserves

The commercial mortgage down payment is not the 3% to 20% you see on residential loans. It is usually 20% to 30% of the purchase price, and it can go higher for riskier properties. A 75% LTV loan means a 25% down payment. A 65% LTV loan means 35% down. But the down payment is not the only cash you need. You also need to cover closing costs, which run 2% to 5% of the loan amount, and a debt service reserve, often six months of payments. For a $1 million purchase with a 75% LTV, that is $250,000 down, plus $20,000 to $50,000 in costs and reserves. Do not forget the appraisal, which can cost $3,000 to $10,000 depending on the property type and location, and the environmental assessment, which is another $2,000 to $5,000 if the lender requires it.

Assemble a File That Leaves Nothing to Guesswork

When you apply, you need a file that leaves nothing to guesswork. The commercial loan documents the lender wants are extensive. Start with two years of personal and business tax returns, plus a year-to-date profit and loss statement. Add a personal financial statement that lists all assets and liabilities, and a business financial statement if the property is owned by an LLC or corporation. The lender will also want a copy of the purchase agreement or the refinance payoff statement, a rent roll with leases for income-producing properties, and an operating history of the property. For a purchase, include a source of funds statement showing where the down payment is coming from. For a refinance, include the current mortgage statement and a payoff quote.

Compare the Benchmarks Before You Apply

Fix the Deal, Don’t Force It

If you run the numbers and the DSCR is below 1.20x or your liquidity is short, do not force the deal. That is how you end up with a balloon payment you cannot refinance. Instead, fix the problem. If the property's NOI is too low, can you raise rents to market? Are there vacancy issues that will clear in six months? If the loan amount is too high, bring more equity. A 65% LTV with a 1.30x DSCR is far safer than a 75% LTV with a 1.10x DSCR, and a good lender will respect the smaller ask. If your credit score is the issue, wait a year and pay down revolving debt. A 700 score today might be 740 in twelve months, which is the difference between approval and rejection at many banks.

Most guides tell you the minimums but not the failure modes. The 504 loan's prepayment penalty is a declining fee on the second mortgage that reaches zero only after year 10, and most borrowers assume it does not exist because the first mortgage has no penalty.

The Interest-Only Trap and the Balloon Refinance Failure

The most common failure mode is the interest-only trap. A borrower takes an interest-only loan at 75% LTV, the property value drops 10%, and the balloon cannot be refinanced because the LTV is now 83%. The bank will not renew at that leverage, and the borrower is stuck. The second failure is the DSCR miscalculation. The borrower uses gross rents instead of net operating income, so the property's real DSCR is 0.95x, not the 1.20x they assumed. The third is the balloon refinance failure: the borrower assumes the bank will renew the loan at maturity, but the bank's credit policy has tightened and the property's NOI has declined. The cause is not stress-testing the deal at a 1.40x DSCR and a 75% LTV. The fourth is the SBA 504 prepayment miscalculation. The borrower assumes the 504 has no prepayment penalty, but the SBA charges a declining fee: 3% in year 1, down to 0% after year 10, on the second mortgage.