What does this lease vs purchase tool compare?

The tool compares the estimated annual and cumulative cost of leasing versus purchasing a commercial property over a chosen analysis horizon. It models rent and rent growth on the lease side, and loan payments plus ownership costs on the purchase side, then shows which option is cheaper based on your assumptions.

How are lease costs calculated?

Lease costs are calculated as annual rent plus tenant‑paid operating costs. Rent can grow each year based on your rent growth assumption. The tool sums these annual costs to show total lease cost over the analysis horizon.

How are purchase costs calculated?

Purchase costs are calculated as annual debt service plus ownership costs such as property taxes, insurance, and maintenance. Debt service is estimated using a standard fixed‑rate loan payment formula. Ownership costs can also grow each year based on your growth assumption.

Does the tool include property appreciation or equity build‑up?

No. This version focuses on cash outflows for occupancy—rent versus loan payments and ownership costs. It does not include property appreciation, equity build‑up, or potential sale proceeds. You can layer those effects into a separate investment model if you want to evaluate wealth creation in addition to occupancy cost.

Can I export the comparison results?

Yes. Use the Export CSV button to download the year‑by‑year comparison of lease and purchase costs. You can share it with partners, store it with your deal notes, or import it into a spreadsheet for further analysis.

Lease vs Purchase Commercial Tool

Compare the long‑term cost of leasing versus buying a commercial property. Model rent, loan payments, and ownership costs to see which option is cheaper over your chosen horizon.

Lease: annual rent ($) Lease: rent growth per year (%) Lease: tenant‑paid operating costs per year ($)

Purchase: price ($) Purchase: loan amount ($) Purchase: loan interest rate (%)

Purchase: loan amortization (years) Purchase: annual ownership costs ($) Purchase: ownership cost growth per year (%) Analysis horizon (years)

Tip: Start with realistic rent and ownership cost assumptions, then test growth and stress‑case scenarios.

Important: This tool focuses on cash outflows for occupancy. It does not include property appreciation, equity build‑up, tax effects, or opportunity cost of capital. Use it as a starting point and combine it with a broader investment analysis when making major decisions.

Lease vs purchase comparison formulas

Comparing leasing versus buying a commercial property is ultimately a question about cash flows and time. Leasing typically involves rent and tenant‑paid operating costs, while purchasing involves loan payments and ownership costs such as taxes, insurance, and maintenance. This tool uses straightforward formulas to estimate those cash flows and compare them over a chosen horizon.

1. Annual lease cost

For each year t:

Rent_t = Rent_1 × (1 + g_rent)^(t − 1)
Tenant operating costs_t = Operating_1 (assumed constant or adjusted separately)

Annual lease cost_t = Rent_t + Tenant operating costs_t

Rent growth is modeled with a simple compound growth rate g_rent. Tenant‑paid operating costs can be entered as a single annual figure. The tool sums these to produce annual lease cost for each year.

2. Loan payment and annual debt service

Monthly interest rate = Loan interest rate ÷ 12 ÷ 100
Number of payments = Loan years × 12

Monthly payment =
  Loan amount × (r × (1 + r)^n) ÷ ((1 + r)^n − 1)

Annual debt service = Monthly payment × 12

This is the standard fixed‑rate loan payment formula. The tool uses it to estimate annual debt service for the purchase scenario.

3. Annual ownership cost

For each year t:

Ownership costs_t = Ownership_1 × (1 + g_own)^(t − 1)

Ownership costs include property taxes, insurance, and maintenance. The growth rate g_own models how these costs change over time.

4. Annual purchase cost

Annual purchase cost_t = Annual debt service + Ownership costs_t

Debt service is treated as constant for a fixed‑rate loan, while ownership costs can grow each year. The sum represents the annual cash outflow for occupying the property as an owner.

5. Cumulative cost comparison

Cumulative lease cost_T = Σ (Annual lease cost_t) for t = 1..T
Cumulative purchase cost_T = Σ (Annual purchase cost_t) for t = 1..T

Difference_T = Cumulative purchase cost_T − Cumulative lease cost_T

The tool calculates cumulative costs for both options over your chosen horizon T. A negative difference means purchasing is cheaper on a pure cash‑out basis; a positive difference means leasing is cheaper.

How to think about leasing vs buying a commercial property

Deciding whether to lease or buy a commercial property is one of the biggest strategic choices many businesses face. Leasing can offer flexibility and lower upfront costs, while buying can provide stability and potential long‑term wealth creation. This tool focuses on the cash cost of occupancy—how much you pay each year to use the space—so you can see the trade‑offs more clearly.

On the lease side, your primary cash outflows are rent and any operating costs you pay as a tenant, such as common area maintenance, utilities, or property taxes in a triple‑net lease. Rent often escalates over time, either through fixed annual increases or periodic market resets. When you enter your starting annual rent and rent growth rate, you are capturing those escalations in a simplified way. Tenant‑paid operating costs can be entered as a single annual figure; in reality, they may also grow, but many users treat them as relatively stable for quick comparisons.

On the purchase side, your cash outflows include loan payments and ownership costs. Loan payments are determined by the loan amount, interest rate, and amortization period. A larger loan or higher rate increases annual debt service; a longer amortization reduces annual payments but may increase total interest over time. Ownership costs include property taxes, insurance, maintenance, and reserves for capital expenditures. These costs can grow over time as property values and service prices change, which is why the tool lets you apply a growth rate to ownership costs.

When you run the comparison, the tool calculates annual lease cost and annual purchase cost for each year in your analysis horizon, then sums them to show cumulative costs. This gives you a clear picture of how much you would pay to occupy the space under each scenario. In some cases, leasing may be cheaper in the early years but more expensive over a long horizon as rent escalates. In other cases, buying may require more cash up front but lead to lower annual costs once the loan amortizes and ownership costs stabilize.

Interpreting the results

If cumulative purchase cost is lower than cumulative lease cost over your chosen horizon, buying may be attractive from a pure occupancy cost perspective. However, you should also consider the opportunity cost of tying up capital in a down payment and closing costs, as well as the risk of owning a property that may not fit your needs in the future. If leasing is cheaper, it may free up capital for core business investments, but you may face more uncertainty around future rent levels and lease renewals.

It is often helpful to run multiple scenarios. Try a conservative case with higher rent growth and ownership cost growth, a base case with moderate assumptions, and an optimistic case with lower growth. You can also adjust the analysis horizon to see how the comparison changes over 5, 10, or 15 years. Shorter horizons emphasize near‑term cash flow, while longer horizons highlight the impact of rent escalations and loan amortization.

Practical tips

Use realistic rent and operating cost assumptions based on current market data and your lease proposals.
For purchase scenarios, include all ownership costs you would be responsible for, not just property taxes.
Consider your business’s growth plans; buying may make sense if you expect to stay in the space long term.
Use the exported schedule to discuss options with your lender, broker, or financial advisor.
Remember that this tool does not include property appreciation, equity build‑up, or tax benefits; layer those into a separate investment analysis if they are important to your decision.

Frequently Asked Questions

Should I include tenant improvement allowances in the analysis?

Tenant improvement allowances and build‑out costs can materially affect your cash outlay. This tool focuses on ongoing occupancy costs, but you can adjust your assumptions or add one‑time costs in a separate model to capture those effects. For a more complete picture, consider both upfront and ongoing costs when comparing lease and purchase options.

Can I model variable rent or percentage rent?

This version uses a simple annual growth rate for rent. Complex structures such as percentage rent or market resets require more detailed modeling. You can approximate them by adjusting the growth rate or manually editing the exported schedule in a spreadsheet.

Does the tool account for vacancy risk?

No. The tool assumes continuous occupancy under both lease and purchase scenarios. Vacancy risk, downtime between tenants, and re‑leasing costs are important considerations for owners and should be modeled separately if you are evaluating the property as an investment.

How do taxes and depreciation affect the decision?

Income taxes and depreciation can significantly affect after‑tax cash flow and long‑term wealth. This tool does not model tax effects. Work with a tax professional or build a separate after‑tax model if you want to incorporate depreciation, interest deductions, and other tax considerations into your lease vs purchase decision.

Is the loan payment calculation exact?

The loan payment is calculated using a standard fixed‑rate amortizing loan formula. Actual lender calculations may differ slightly due to rounding, fees, or timing conventions. Use this tool for planning and comparison, and confirm exact payment details with your lender.

Is this tool financial advice?

No. The tool is for education and planning. It can help you visualize the cash cost of leasing versus buying, but it is not personalized financial advice. Consider speaking with a qualified advisor before making major real estate decisions.