Most business owners who decide to buy their building make the same structural mistake: they buy it in the wrong entity. They put the property in their operating company, mix two very different types of assets under one roof, and spend the next decade untangling the consequences. The solution is a two-entity structure that separates your operating business from your real estate holding -- commonly called the OpCo/PropCo split.
What OpCo/PropCo Actually Means
The names are straightforward. Your Operating Company (OpCo) is the business entity that runs your day-to-day operations -- serves clients, employs your staff, generates revenue, and carries the liabilities that come with running a business. Your Property Company (PropCo) is a separate legal entity, typically a single-member or multi-member LLC, that owns the real estate and does nothing else.
Under this structure, your PropCo purchases the commercial building. Your OpCo signs a formal lease agreement with your PropCo and pays monthly rent. PropCo collects that rent, uses it to service the mortgage, and keeps any surplus. The two entities transact at arm's length, as if they were completely independent parties -- which, legally, they are.
This is not a complicated arrangement. It is a standard structure that any experienced commercial real estate attorney can set up in a day. What is less common is business owners actually using it.
The Asset Protection Argument
The most immediate reason to separate your building from your business is liability isolation. Your operating company faces real-world risk every day -- a client lawsuit, an employment dispute, a contract claim, a slip-and-fall on your premises. If your building sits inside the same entity that faces those risks, a creditor who wins a judgment against your business can potentially reach your real estate.
With a properly structured PropCo, the building lives in a separate legal entity with its own liability shield. A creditor of your operating company cannot simply seize an asset that belongs to a different entity. They may be able to place a charging order against your membership interest in PropCo, but seizing or forcing a liquidation of the property itself is a much harder legal battle.
The same logic works in reverse. If PropCo has any liability -- a tenant injury in the parking lot, a dispute with a contractor -- that exposure stays in PropCo and does not reach your operating business or personal assets. Clean separation is the point.
The Tax Architecture
The OpCo/PropCo structure creates meaningful tax planning opportunities on both sides of the ledger.
On the PropCo side, your rental income offsets your mortgage interest deduction, depreciation on the building, property taxes, insurance, maintenance, and any other property-related expenses. If your PropCo is structured as a pass-through entity (a single-member LLC taxed as a disregarded entity, or a partnership), the net income or loss flows directly to your personal return. Building depreciation alone on a $1 million commercial property generates approximately $25,000 per year in deductions at the standard 39-year schedule -- and significantly more if you accelerate depreciation through a cost segregation study.
On the OpCo side, the rent your business pays to PropCo is a fully deductible business expense. This converts what would otherwise be non-deductible equity buildup into a deductible operating expense. Your OpCo pays rent. PropCo uses that rent to service a mortgage that builds equity in real estate you own. Every dollar of that rent payment is working in two directions simultaneously.
The intercompany lease rate matters. The IRS requires that related-party transactions occur at fair market value. Set the rent too high and you are shifting income inappropriately to PropCo. Set it too low and PropCo cannot cover its costs. Have a market-rate analysis done when you set the lease terms and revisit it every few years as market rents change.
How It Transforms Your Exit
The OpCo/PropCo structure is not just a protection and tax tool -- it is an exit planning tool. When you eventually sell your business, the separation of entities gives you more options and almost always more money.
A buyer purchasing your operating business is acquiring your revenue, your client relationships, your processes, and your team. They may or may not want your building. With a unified structure, you are forced to sell everything together and negotiate a combined price. With OpCo/PropCo, you have two distinct transactions you can sequence independently.
The most common exit strategy involves selling the OpCo while retaining the PropCo. Your business sale generates a lump sum. Meanwhile, you negotiate a long-term lease with the buyer of your business, who now becomes your tenant. You have converted from a business owner to a commercial landlord, collecting rent from the very operation you built. Many business owners find the PropCo produces more reliable, lower-maintenance income than the business ever did -- with none of the operational headaches. For a deeper look at this exit strategy, see the post on using your building as a retirement plan.
Alternatively, you can sell the PropCo separately to a real estate investor at a valuation based on the lease income it generates. A building leased long-term to a creditworthy tenant commands a premium and can be sold at a significant multiple of your original purchase price.
Setting Up the Structure Correctly
The PropCo entity is typically a state LLC in the state where the property is located. If you and a business partner co-own the property, PropCo becomes a multi-member LLC with a partnership operating agreement that addresses ownership percentage, profit distributions, buyout provisions, and what happens if one partner wants to exit. These conversations are easier to have before you buy than after.
The lease agreement between OpCo and PropCo should be a formal, written commercial lease with market-rate terms, a defined term (typically 5-10 years with renewal options), and provisions that mirror a third-party landlord-tenant relationship. Do not use a handshake arrangement. Do not let the rent payment be informal or irregular. The IRS and any future creditor or buyer will scrutinize the intercompany relationship, and a sloppy paper trail is an invitation to problems.
Work with a commercial real estate attorney and a CPA who understands entity structuring. The setup cost is typically $2,000-$5,000 in legal and accounting fees -- a one-time investment that protects a seven-figure asset for the life of the ownership.
Financing the PropCo Purchase
One practical question that comes up immediately: will lenders finance a building purchase in a PropCo LLC rather than in your operating company? The answer is yes, with some nuance. Most commercial lenders and SBA 504 programs are accustomed to lending to holding entities, particularly when the borrower (you) personally guarantees the loan. The lender underwrites the deal based on your personal financials, the operating company's revenue (which is the source of the rent that will service the mortgage), and the property value itself.
For SBA 504 financing, the PropCo entity must still meet the owner-occupancy requirement: the operating company (your tenant) must occupy 51% or more of the building. The SBA has clear guidance on this structure and it is routinely approved. Confirm the entity structure with your CDC and first-mortgage lender early in the process so there are no surprises at underwriting.
When the Structure Does Not Make Sense
The OpCo/PropCo split works best for business owners with stable, ongoing operations who plan to hold the building long-term. It is overkill for a very small purchase or a transitional situation where you plan to sell both the business and the building within a few years. In those cases, the added administrative complexity of maintaining two entities may not justify the benefits.
The structure also requires discipline to maintain. You cannot commingle funds between the two entities. You cannot skip the formalities of the intercompany lease or let related-party payments become informal. The protection the structure provides depends entirely on treating the two entities as genuinely separate -- which means proper bookkeeping, separate bank accounts, and annual entity maintenance filings in your state.
Chapter 6 walks through the full OpCo/PropCo setup with real-world examples, sample lease structures, and guidance on working with your attorney and CPA to implement this correctly from day one. Get your copy of Buy The Building, Keep The Profits.
The Bottom Line
The decision to buy your commercial building is the first big move. The decision to buy it in the right structure is what makes that move pay off for decades. The OpCo/PropCo split is not a tax scheme or a loophole -- it is sound business architecture that separates your operational risk from your real estate asset, maximizes your deductions on both sides, and positions you for a cleaner, more valuable exit when the time comes.
If you are in the process of evaluating a commercial property purchase, the question of entity structure should be on the agenda before you make an offer -- not after you close. Getting this right from day one costs very little and saves an enormous amount of complexity later.