The Direct Answer
Start with what your business needs the property to do. Then compare leasing and ownership over the same period, using the full occupancy cost and the cash required. A smaller mortgage payment alone does not establish that buying is the better decision.
Start with the operating requirement
Before looking at financing, write down the requirement: location, usable area, parking, loading, power, customer access, permitted use, and the date you need to open. Add what could change over your intended holding period. A property that fits today may constrain an expansion or require an expensive conversion.
Separate the needs you must satisfy from preferences you can negotiate. For an owner-user, this keeps the business decision ahead of the attraction of owning real estate. For a tenant, it creates a useful search brief rather than a list of available suites.
Compare the same costs on both sides
Build two schedules using the same space requirement and time horizon. Record the actual lease proposal and the written financing indication. Leave uncertain items identified as gaps until you have documents or quotes.
| Cost or commitment | Leasing | Buying |
|---|---|---|
| Initial cash | Deposit, advance rent, improvements, moving and professional fees | Equity, closing and inspection costs, improvements, moving and reserves |
| Recurring occupancy | Base rent, contractual expense reimbursements, utilities and tenant obligations | Debt service, taxes, insurance, maintenance, management and property obligations |
| Large work | Allocate each item under the proposed lease | Price the work and identify responsibility before closing |
| Exit | Assignment, subletting, renewal or expiration terms | Sale, leasing to another user, refinance or continued ownership |
Do not compare a full-service rental quote with a mortgage payment that excludes property operating expenses. Also distinguish cash outflow from economic cost: principal repayment reduces debt, but still consumes cash each month. Ask your CPA to model taxes separately rather than inserting an assumed deduction into the property comparison.
Keep business liquidity in the calculation
Ask what cash remains after the acquisition and move. Buying can satisfy the property requirement while leaving the operating company with too little liquidity for inventory, payroll, receivables, or expansion. Put those competing uses of capital on the same page.
Set a reserve requirement with the people responsible for the business finances. Identify the repairs that would have to be funded immediately and the obligations that could become due before the property has generated any investment return. Do not treat the down payment as the complete capital requirement.
Read the financing structure
Request the interest rate structure, amortization, maturity, required equity, fees, guarantees, prepayment provisions, and approval conditions. A loan amortized over a longer period can still mature earlier; read the date the remaining balance becomes payable.
SBA describes its 504 program as financing for qualifying fixed assets, including buildings and land. It excludes speculation or investment in rental real estate. Eligibility is a lender and Certified Development Company review, not a conclusion based on a listing. See source 1.
For an existing building, the borrower-occupancy rule in 13 CFR §120.131 requires at least 51% of the rentable property to be permanently occupied and used by the borrower for the covered SBA financing. New construction has different requirements. Have the lender apply the rule to the proposed layout and ownership structure. See source 2.
A payment comparison is only the beginning
Hypothetical example. A 2,000 SF lease at $24/SF/year costs $48,000 annually in base rent. If the proposal also specifies $8/SF/year in additional expenses, the combined amount is $64,000 annually, or about $5,333 monthly, before utilities and other obligations. These are illustrative inputs, not local market quotes.
Compare that amount with ownership only after adding the actual debt service and property budget. Then account for acquisition cash, improvements, major replacements, and exit costs. If a cost has not been quoted, show it as unresolved; do not replace the gap with zero.
Test a change in plans
Ask what happens if the business needs more space, changes its service area, or closes a location. For the lease, review options, assignment and subletting provisions, remaining obligations, and any personal guarantee with counsel. For ownership, examine whether another user could occupy the property and what changes that would require.
Also test the financing maturity against the business plan. A future refinance is an event that needs underwriting; it is not cash you already control. Request a downside comparison using the lender’s requirements and your business’s actual ability to support the property.
Bring these documents to the decision
- A written space requirement and intended occupancy period.
- A lease proposal showing base rent and every additional charge.
- A financing indication showing maturity, amortization and equity.
- Property operating records, insurance quotes and inspection scope.
- A priced improvement plan and move schedule.
- A cash forecast showing the operating company after the move.
Review the two schedules with your broker, lender, CPA, and attorney. Choose the option whose documented costs and commitments fit the operating plan. If either schedule has a material unresolved item, resolve it before treating the comparison as complete.
Sources & scope
1. SBA: 504 loan program2. 13 CFR §120.131: borrower occupancy3. SEC: Financial Reporting Manual, section 2340Source review: October 2, 2026. Recheck rules, documents, and project statuses before relying on them in a transaction. Checklists and decision questions are editorial guidance; numerical examples are labeled hypothetical.
Financing eligibility and tax treatment depend on the transaction. Confirm them with your lender and CPA; have counsel review proposed agreements.