Buying vs. Leasing Commercial Property in South Dakota: How to Run the Numbers

Every business owner I sit down with in Sioux Falls eventually asks the same question: are we better off buying or leasing our next building? The honest answer is that buying vs leasing commercial property is a financial modeling exercise disguised as a gut decision, and most owners make it with a gut decision alone. Run the actual numbers over a realistic hold period and the right answer usually becomes obvious. This guide walks through every line item that matters, using real South Dakota figures, so you can build your own comparison before you call your lender or your broker.

I have represented buyers, sellers, landlords, and tenants on both sides of this decision for over a decade in Sioux Falls commercial real estate, and the pattern is consistent. Owners who buy too early get squeezed by growth they did not plan for. Owners who lease too long give away equity they could have captured. There is a break-even point in between, and it depends on your cost of capital, your growth trajectory, and how long you actually plan to occupy the space. Let's build the model.

Start With Total Occupancy Cost, Not Rent vs. Mortgage

The single biggest mistake I see is comparing a monthly lease rate to a monthly mortgage payment as if they were apples to apples. They are not. Total occupancy cost includes rent or debt service, common area maintenance or your own maintenance reserve, property taxes, insurance, utilities not separately metered, and any tenant improvement amortization. On the ownership side you also need to account for capital reserves, since a landlord's CAM charge already has a maintenance and capex component baked into it that an owner-user has to self-fund.

In Sioux Falls, industrial and flex space commonly leases in the $7.00 to $10.50 per square foot NNN range depending on clear height, dock doors, and location relative to I-29 and I-90. Retail along Phillips Avenue, near the Empire Mall, or in growth corridors like Tea and Harrisburg can run from $14 to $28 NNN. Office space downtown or in the west side corporate corridor typically runs $12 to $19 full service. Those base numbers are your leasing comparison point, but you still have to add the NNN or CAM pass-throughs to get true occupancy cost.

Building the Comparison Spreadsheet

• Column 1: Annual lease cost including base rent, NNN reimbursements, and TI amortization
• Column 2: Annual ownership cost including debt service, property taxes, insurance, and a capital reserve of $0.15 to $0.35 per square foot per year
• Column 3: Equity build from principal paydown each year
• Column 4: Estimated appreciation, conservatively 2 to 3 percent annually in most Sioux Falls submarkets
• Column 5: Tax impact of depreciation and interest deduction versus fully deductible rent

Financing the Purchase: SBA 504, 7(a), and Conventional

Most owner-users buying in the $500,000 to $5 million range use SBA 504 financing, which typically allows 10 percent down for an established business in a standard building, 15 percent for a special-purpose property like a restaurant or car wash, and 20 percent if both conditions apply. The structure splits financing between a conventional first mortgage covering roughly 50 percent of project cost, a Certified Development Company second mortgage covering roughly 40 percent at a below-market fixed rate, and your down payment covering the remainder. SBA 7(a) loans can finance up to 90 percent of the purchase in a single loan and are more flexible if you are also financing working capital or equipment alongside the real estate, but rates run slightly higher than the 504 second.

Conventional bank financing from a local South Dakota lender is still common for stronger balance sheets, usually requiring 20 to 25 percent down with a 5 to 7 year fixed rate that resets, amortized over 20 to 25 years. The advantage of conventional is speed and fewer forms; the disadvantage is a larger equity requirement and rate resets that leasing does not expose you to.

Down Payment Is Not Dead Money

Owners often treat the down payment as a cost of buying, but it is really a forced investment. That capital builds equity through principal paydown and appreciation instead of disappearing into a landlord's return. The question is whether that same capital, if left in the business instead, would generate a higher return than the real estate does. For most stabilized small and mid-size businesses in Sioux Falls, real estate returns 6 to 10 percent annually between equity build and appreciation, which is a reasonable but not extraordinary hurdle to beat.

Debt Service vs. Rent: The Real Comparison

Here is where buying vs leasing commercial property gets interesting. A 25-year SBA 504 amortization on a $1.2 million purchase at a blended rate near 7 percent produces an annual debt service around $102,000. A comparable leased space at $9.50 NNN on 10,000 square feet, plus roughly $3.25 in NNN charges, runs about $127,500 annually before any escalations. On pure cash flow, ownership frequently wins in South Dakota's currently priced market, especially once you account for the fact that roughly 35 to 45 percent of an early-year mortgage payment is principal, not an expense at all.

But debt service is fixed and rent typically escalates 2 to 3 percent per year, so the leasing comparison should be run over the full intended hold period, not year one alone. A five-year lease with 3 percent annual bumps costs meaningfully more in year five than year one, while your mortgage payment on a fixed-rate loan does not move. This is one of the strongest long-term arguments for ownership if you are confident in your occupancy horizon.

Equity Build, Depreciation, and South Dakota Tax Treatment

South Dakota has no state corporate or personal income tax, which changes this analysis compared to states like Minnesota or Iowa. You do not get a state-level deduction advantage from mortgage interest or depreciation the way you might elsewhere, so the federal depreciation shield (typically straight-line over 39 years for commercial property, with cost segregation potentially accelerating a meaningful chunk into bonus depreciation) is your primary tax lever. Property taxes, however, are a real annual cost either way, and South Dakota's commercial property tax rates, layered through county, city, and school levies, generally land in a range that owners should verify directly with the Minnehaha or Lincoln County treasurer for their specific parcel.

Rent, by contrast, is 100 percent deductible as an operating expense with none of the complexity, which some owners genuinely prefer from a simplicity standpoint even when it costs more in raw dollars.

Maintenance, Capex Reserves, and Property Tax Treatment

Ownership means you own the roof, the HVAC units, the parking lot, and every future capital expense. A prudent owner-user budgets a capital reserve of at least $0.20 per square foot annually for a typical flex or office building, more for older buildings or those with significant HVAC tonnage. Skipping this reserve is the number one way owners get blindsided by a $40,000 rooftop unit replacement they did not plan for. Under a lease, the landlord typically carries structural and major system responsibility, and your CAM charge, while it feels like dead money, is effectively pre-funding that risk on your behalf.

Flexibility and Growth Risk

This is the factor spreadsheets underweight and businesses overweight in the wrong direction. If you expect to double headcount or square footage needs within five years, buying a building sized for today can trap you, and selling a specialized building on a compressed timeline rarely nets full value. Leasing gives you an exit at the end of the term and room to expand into a larger space nearby. Conversely, if your space needs are stable or you are buying a building with room to expand or sublease a portion, ownership's flexibility concerns shrink considerably.

Questions to Ask About Your Own Growth

• Do we expect to need materially more or less square footage in 5 years?
• Could this building accommodate that growth, or would we outgrow it?
• Is our industry or lease type easily subleased if our needs shrink?
• Are we comfortable being the landlord of record for our own operations?

Break-Even Hold Period

Because buying carries upfront transaction costs, closing costs, and typically a slightly higher initial cash outlay than a lease deposit, there is a minimum hold period below which leasing wins on pure economics regardless of the long-term trend. In most Sioux Falls deals I model, that break-even lands between 4 and 6 years. If you are confident you will occupy the building for 7 years or more, ownership almost always wins over the full period. If your horizon is under 3 years, lease.

Owner-User Cap Rate Logic

When you buy as an owner-user rather than a pure investor, you are effectively buying at your own implied cap rate, calculated as your annual occupancy cost (what you would otherwise pay in rent) divided by the purchase price. If market rent for comparable space is $9.50 NNN and you are paying $120 per square foot for a building, your implied going-in yield on the rent you are saving is roughly 7.9 percent, which compares favorably to buying the same building as a pure investment at a market cap rate of 7 to 8 percent for stabilized industrial product in Sioux Falls. The math converges nicely for owner-users, which is part of why owner-user demand remains strong in our market even as investor cap rates have moved with interest rates.

Sale-Leaseback as a Hybrid Strategy

For businesses that already own their building and need to unlock capital, a sale-leaseback lets you sell to an investor and lease back the space on a long-term NNN lease, freeing equity for expansion, equipment, or debt paydown while retaining operational control of the location. This works particularly well for owners nearing retirement who want to de-risk their real estate exposure while keeping the business running, or for growing companies that need capital more than they need a real estate asset on the balance sheet.

Worked Example: 10,000 SF Flex Building in Sioux Falls

Assume a 10,000 square foot flex building priced at $1,150,000, and a comparable lease available at $8.75 NNN with $2.75 estimated NNN charges.

In year one, ownership costs roughly $8,850 less than leasing on a cash basis, and roughly $41,000 of the debt service is building equity rather than disappearing as an expense. Add a conservative 2.5 percent annual appreciation and by year 7 the owner has built well over $400,000 in combined equity and appreciation, versus a lease that has escalated to nearly $117,000 annually with zero equity created. This is the calculation that convinces most established Sioux Falls businesses to buy once they can clear the down payment hurdle.

The businesses that regret leasing long-term almost always regret it for the same reason: they paid down someone else's mortgage for fifteen years and have nothing to show for it but a longer commute if they ever have to move.

Decision Checklist

1. 1.Calculate total occupancy cost for both scenarios, not just rent vs. mortgage payment
2. 2.Confirm your realistic occupancy horizon: under 4 years favors leasing, 7+ years favors buying
3. 3.Get pre-qualified for SBA 504, 7(a), or conventional financing to know your real down payment number
4. 4.Budget an annual capital reserve of at least $0.20/sf if buying
5. 5.Model rent escalations over your full expected hold period, not just year one
6. 6.Evaluate whether the building can accommodate your growth for the next 5 to 7 years
7. 7.Consider a sale-leaseback if you need capital more than you need the asset on your balance sheet
8. 8.Talk to a broker who can pull actual comparable sale and lease data for your submarket

Get a Building-Specific Comparison from Nelson Commercial

Buying vs leasing commercial property is not a decision to make from a rule of thumb, it is a decision to make from a spreadsheet built around the specific building, lease, and financing terms in front of you. Nelson Commercial Real Estate has run this analysis for owner-users across every asset class in Sioux Falls, Tea, Harrisburg, Brandon, Dell Rapids, and Vermillion, and we are large enough to close the deal and small enough to care about getting your number right. Call us at 605.977.0778 or email website@ncommercial.com and we will build the comparison alongside you before you sign anything.