Business Mortgage Calculator
A business buying the building it operates in borrows differently from an investor buying rental property. Owner-occupied business mortgages, especially SBA 7(a) and 504 loans, pair long fully-amortizing terms with a guarantee fee that changes the true cost of borrowing. This business mortgage calculator sizes the monthly payment, the SBA guarantee fee, the loan-to-value, the total interest, and the effective APR with fees included. (Buying to collect rent instead? That is an investor product with balloon payments and DSCR underwriting, covered by the commercial mortgage calculator.)
Effective APR is the rate that makes the present value of all payments equal the net loan proceeds (loan minus guarantee fee and closing costs). The fee is applied to the full loan amount; the real SBA fee applies to the guaranteed portion (usually 75%), so scale your input accordingly. Results stay hidden until you click Calculate Loan.
Quick Answer
An $800,000 property with $120,000 down at 7.25% over 25 years costs $4,915.09 per month. The loan is $680,000, the SBA guarantee fee adds $18,700 at closing, total interest is $794,526, and the effective APR with all fees is 7.775% versus the 7.25% note rate. At 85% LTV, this sits in SBA territory, and the total cash cost of the loan is $1,625,226. Type your own figures into the calculator above for the same breakdown.
Key takeaways
- The note rate is not the borrowing cost: a 2.75% guarantee fee plus $12,000 of closing costs lifts this example's true annual cost from 7.25% to 7.775%.
- The LTV badge reads your leverage: 75% and under is conventional-friendly, 75 to 90% is SBA territory, above 90% is high leverage. These are guidance bands, not lender approvals.
- SBA 7(a) handles flexible single loans up to $5 million; SBA 504 splits the deal 50/40/10 with a fixed debenture rate and usually costs less for straightforward purchases.
- Owner-occupied SBA loans fully amortize with no balloon. Balloons belong to the investor product, not this one.
- Quick Answer
- How to use the business mortgage calculator
- The monthly payment math
- The effective APR: what the true cost actually means
- Reading your LTV badge
- The guarantee-fee honesty note
- SBA 7(a) vs 504 vs conventional
- The SBA path, step by step
- What this calculator covers, and why each part matters
- Frequently asked questions
- Add This Calculator to Your Website
- References
How to use the business mortgage calculator
Enter the purchase, the financing, and the fees, then read six outputs. Results stay hidden until you calculate.
- Property price and down payment: the building's purchase price and your cash injection. The example uses $800,000 with $120,000 down, leaving a $680,000 loan.
- Interest rate and term: the lender's quoted note rate and the full amortization period. The example uses 7.25% over 25 years, the classic SBA real-estate shape.
- SBA guarantee fee: the one-time fee as a percent of the loan. The 2.75% default is a mid-band estimate; set it to 0 for a non-SBA loan. The fee honesty note below explains what this input really means.
- Other closing costs: appraisal, legal, title and environmental reports. The example uses $12,000.
- Click Calculate Loan: the monthly payment appears large at the top, with the LTV badge and six figures underneath: loan amount, loan-to-value, SBA guarantee fee, total interest, effective APR and total cost of loan.
- Copy or share the result block when you want to keep a record or send it to a partner.
The tool clamps impossible inputs rather than crashing: negative entries become zero, a term under one year becomes one year, and a down payment larger than the price floors the loan at zero. Blank fields count as zero.
The monthly payment math
The payment uses the standard amortization formula: the loan amount multiplied by the monthly rate, divided by one minus the discount factor. With a 0% rate the payment is simply the loan divided by the number of months.
L = loan amount (price minus down payment), r = annual rate ÷ 12, n = term in years × 12
For the example: L = $680,000, r = 0.0725 ÷ 12, n = 300. The payment comes out at $4,915.09, and the mortgage payment calculator runs the same core math for any loan type when you only need the payment.
The effective APR: what the true cost actually means
The note rate prices the loan; the effective APR prices the deal. This calculator finds the single annual rate that makes the present value of all 300 payments equal the net loan proceeds, meaning the loan amount minus the guarantee fee and closing costs you pay at the table. That is a net-proceeds internal rate of return, solved by bisection, and it is the number that lets you compare an SBA quote against a conventional one honestly.
In the example, $18,700 of guarantee fee plus $12,000 of closing costs leaves net proceeds of $649,300 on a $680,000 loan. The rate that discounts 300 payments of $4,915.09 back to $649,300 is 7.775% per year, more than half a point above the 7.25% note rate. A conventional loan with the same note rate but no guarantee fee would show an effective APR much closer to 7.25%. When lenders compete, line up their effective APRs, not their headline rates.
The method, kept visible: net proceeds = loan − guarantee fee − closing costs; effective APR = the annual rate r solving Σ payment ÷ (1 + r/12)t = net proceeds. The tool reports this to three decimals. It is not the note rate, and it is not a lender's Reg Z APR disclosure, which can include different fee treatments.
Reading your LTV badge
Loan-to-value is the loan divided by the property price. The badge the calculator shows reads your leverage at a glance, and each band carries a plain-English reading:
| LTV band | Badge reading | What it means |
|---|---|---|
| 75% and under | conventional-friendly leverage | Conventional commercial lenders typically want 20 to 30% down, so this zone shops well beyond SBA programs. |
| 75 to 90% | SBA territory | The 10 to 15% down range where SBA 7(a) and 504 loans do their best work. |
| Above 90% | high leverage | Thin equity. Expect tougher terms, more collateral demands, or a declined application. |
These bands are guidance, not lender approvals. Real SBA eligibility is program-specific: 7(a) down payments typically run 10 to 15% for commercial real estate, 504 needs 10% from established businesses on standard properties but 15 to 20% for special-use properties or newer businesses, and every lender sets its own overlay on top. The badge tells you which neighborhood you are in, not whether you get the loan.
The guarantee-fee honesty note
Here is the one place to read carefully, because the tool simplifies something the SBA does not. The SBA charges the guarantee fee on the guaranteed portion of the loan, which is usually 75% of a 7(a) loan, not on the full loan amount. The calculator applies your fee input to the full loan instead, because it is a single transparent input that works for both SBA and non-SBA loans.
What that means in practice: the default 2.75% on a $680,000 loan shows $18,700. If the real schedule charges 3% on the guaranteed 75% ($510,000), the actual fee is $15,300. To match the tool to the official schedule, scale your input down: an official 3% on the guaranteed portion is roughly 2.25% on the full loan. The current schedule is tiered, not flat: for FY 2026 the SBA set 2% on loans up to $150,000, 3% from $150,001 to $700,000, and 3.5% on the guaranteed portion up to $1 million, and the FY 2027 notice waives the fee entirely for qualifying small loans to manufacturers, food-supply businesses and rural borrowers. The 2.75% default is a mid-band estimate, and lenders can also finance the fee into the loan rather than collecting it at closing, which changes the net-proceeds math. Check the SBA's current fee notice before you lock numbers into an offer.
SBA 7(a) vs 504 vs conventional
Owner-occupants usually choose among three doors. The calculator models the 7(a)-style single loan; the comparison below shows why borrowers still price all three:
| Program | Structure | Down payment | Best for |
|---|---|---|---|
| SBA 7(a) | One loan, one lender, SBA guarantee up to 85% | 10 to 15% | Flexible deals: building plus equipment or working capital in one loan |
| SBA 504 | 50/40/10 split: bank first mortgage, CDC debenture, borrower equity | 10% (15 to 20% for special-use or new businesses) | Straightforward purchases: below-market fixed debenture rate, usually cheapest |
| Conventional | Bank loan, no SBA involvement | 20 to 30% | Fast closings and borrowers with strong cash flow who can put more down |
Both SBA programs require the business to occupy at least 51% of an existing building, and 504 loans cannot fund working capital or goodwill, which is why acquisition-heavy deals still go 7(a). If you are weighing debt against raising equity for the purchase, the cost of new equity calculator frames the other side of that decision.
The SBA path, step by step
Expect the process to take time. A realistic timeline runs 60 to 90 days from complete application to funding for 7(a); 504 deals run through a Certified Development Company on a similar clock.
What this calculator covers, and why each part matters
This calculator prices an owner-occupant business mortgage the way it is actually quoted: purchase price to loan amount, with the guarantee fee, closing costs, and the true annual cost all in the same breakdown.
- The purchase-price-to-loan path. An $800,000 property with $120,000 down at 7.25% over 25 years costs $4,915.09 per month. The loan is $680,000, and the total cash cost of the loan is $1,625,226.
- The guarantee fee, priced and disclosed. The SBA guarantee fee adds $18,700 at closing on the worked example, applied to the full loan amount, with that simplification disclosed in plain sight.
- The effective APR, not just the note rate. The note rate is not the borrowing cost: a 2.75% guarantee fee plus $12,000 of closing costs lifts this example's true annual cost from 7.25% to 7.775%, and total interest is $794,526.
- An LTV badge with program guidance. At 85% LTV, the worked example sits in SBA territory. The bands are guidance, not lender approvals: 75% and under is conventional-friendly, 75 to 90% is SBA territory, above 90% is high leverage.
- SBA 7(a) vs 504 vs conventional, framed for an owner-occupant. SBA 7(a) handles flexible single loans up to $5 million; SBA 504 splits the deal 50/40/10 with a fixed debenture rate and usually costs less for straightforward purchases. Owner-occupied SBA loans fully amortize with no balloon: balloons belong to the investor product, not this one.
If you are still deciding between buying and leasing, the business rent calculator prices the lease side: what your revenue can support and what a quoted space really costs each month.
Frequently asked questions
SBA 7(a) real-estate loans typically need 10 to 15% down; SBA 504 loans need 10% from established businesses buying standard properties, rising to 15 or 20% for special-use properties or newer businesses. Conventional commercial loans usually want 20 to 30%. The exact figure depends on the lender, the property type and your financials.
The guarantee fee is the one-time charge for the SBA's guarantee, and 2.75% is not an official rate: it is this calculator's mid-band default. The real schedule is tiered (for FY 2026: 2% on loans up to $150,000, 3% from $150,001 to $700,000, 3.5% on the guaranteed portion up to $1 million), and it applies to the guaranteed portion of the loan, usually 75%, not the full loan amount. The fee section above explains how to scale your input.
Generally no. SBA real-estate loans fully amortize over up to 25 years. Balloons belong to conventional investor commercial loans: shorter terms with long amortizations and the remaining balance due at maturity.
The 504 is usually cheaper for a straightforward owner-occupied purchase: 10% down and a below-market fixed debenture rate on the 40% CDC portion. The 7(a) is more flexible (it can wrap equipment and working capital into the same loan and funds acquisitions) but the variable rate and guarantee fee make it pricier.
The note rate prices the loan balance; the effective APR prices the whole deal. This calculator solves for the rate that makes the present value of all payments equal the net proceeds (loan minus guarantee fee and closing costs). In the worked example that turns a 7.25% note rate into a 7.775% effective APR. Compare lenders on the effective APR, not the headline rate.
Because it keeps one transparent input that works for SBA and non-SBA loans alike. The real SBA fee applies to the guaranteed portion (usually 75% of a 7(a) loan), so the tool's default slightly overstates the official fee. Scale your input down by about a quarter to match the schedule, for example 2.25% instead of 3%.
Most want 75% LTV or lower, meaning 25% down or more, with 70% common on riskier property types. That is the green conventional-friendly band on the calculator's badge. Between 75 and 90% you are in SBA territory; above 90% expect tougher terms.
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References
- U.S. Small Business Administration. Access affordable 7(a), 504, & microloans (7(a) is SBA's primary program: loan guaranties for acquiring, refinancing or improving real estate; maximum 7(a) loan $5 million; borrowers work through lenders, not SBA directly). Accessed October 24, 2026.
- U.S. Small Business Administration. 7(a) Fees Effective October 1, 2026 for Fiscal Year 2027 (Information Notice 5000-881797: FY 2027 upfront guaranty fee schedule; 0% upfront fee for qualifying 7(a) loans of $700,000 or less to manufacturers, food-supply businesses and rural borrowers). Accessed October 24, 2026.
- U.S. Small Business Administration. Small Businesses Now Eligible for $10 Million in SBA Financing (borrowers may combine 7(a) and 504 loans up to $10 million total, effective July 4, 2026). Accessed October 24, 2026.
- LendingTree. SBA 7(a) Loan: Rates & Approval Tips (guarantee fee tiers: 2.00% under $150,000, 3.00% from $150,001 to $700,000, 3.50% on the guaranteed portion up to $1 million plus 3.75% above; fee is a percentage of the guaranteed portion and is often passed to borrowers). Accessed October 24, 2026.
- Mondaq. SBA 504 Loans: Business Owner's Guide (the 50/40/10 structure: bank funds 50%, CDC debenture 40%, borrower 10%; 10% down on a $2 million building is $200,000 vs $500,000 conventional). Accessed October 24, 2026.
- WaFd Bank. SBA 504 Loan Requirements and How to Qualify (three-part structure with as little as 10% equity; loans $250,000 to $15 million; terms 10 to 25 years; fixed interest rate). Accessed October 24, 2026.
- MMCG Investment. SBA 7(a) and 504 Loans for Real Estate: A Guide (7(a) capped at $5 million, terms up to 25 years for real estate; 504 split structure; both require 51%+ occupancy of existing buildings; lenders underwrite to about 1.25x DSCR). Accessed October 24, 2026.
- Commercial Loan Direct. SBA 7(a) Commercial Loans (the SBA guarantees a portion of loans made by approved private lenders rather than lending directly; up to $5 million; 10% minimum down on real estate; 25-year maximum real-estate term). Accessed October 24, 2026.
- Standout Loans. SBA 7(a) Loans for Commercial Real Estate (typical time to close 45 to 60 days; three years of tax returns, debt schedule and projections among required documents; variable rates tied to prime). Accessed October 24, 2026.
- PG Strategic. Complete Guide to SBA 7(a) Loans (real estate: 25-year maximum term with 51%+ owner occupancy; rate spreads over prime by loan size; startups face extra scrutiny with minimum 10% equity). Accessed October 24, 2026.