Amortization, balloons, and the down payment gap between conventional and SBA 504 — worked on a $750,000 property, including what's still owed at year five.
July 10, 2026 · Relief Capital Funding Desk
A commercial real estate loan finances the purchase, construction, or refinance of property your business operates from, secured by the property itself. The structural difference from residential lending is that the building's ability to support the debt matters as much as your business's — lenders look at the property's value, its condition, its marketability if things go wrong, and whether the space genuinely suits the operation you're running in it. It is the longest-dated borrowing most small businesses will ever do, and the most consequential.
Owner-occupied is the key qualifier and it has a specific meaning. Financing designed for businesses buying their own premises generally requires you to occupy a majority of the space — commonly at least 51% for SBA-backed purchases of existing buildings, with different thresholds for new construction. Buy a building to lease entirely to other tenants and you're an investor seeking investment property financing, which is a different product with different terms and a different rate. The distinction catches owners out when they plan to sublet more of the space than the loan permits.
The strategic case is straightforward and genuinely strong: rent is an expense that rises indefinitely and produces nothing you own, while a mortgage payment on a comparable space is often similar in size and builds equity in an asset you control. It also removes the single largest operational risk many small businesses carry, which is a landlord deciding not to renew a lease on a location the business depends on. What the case ignores, and what this guide covers, is that buying converts flexible occupancy costs into fixed debt on a twenty-year horizon. It also concentrates risk. A business that owns its building has its operating performance and a large illiquid asset tied to the same location and often the same local economy, financed with the same cash flow. That's usually fine and occasionally the reason a downturn becomes unrecoverable, so the comparison worth running isn't just mortgage against rent — it's whether the business can carry the property through a bad year without the property forcing a decision about the business.
Two minutes with the desk beats two hours of tabs
Have a property in mind or a lease coming up for renewal? A short call will tell you which structure fits the deal.
Typical commercial property loan range
$100,000 – $5,000,000+
Indicative; final terms depend on lender and profile.
Typical amortization schedule
10 – 25 years
Indicative; the amortization a lender offers depends on the property and the program.
Put two schedules side by side on the same $750,000 at an illustrative 8%. Amortized over twenty years the payment is about $6,273 a month; over twenty-five years it's about $5,789 — a difference of roughly $485 a month, which sounds minor until you follow it to the end. Total interest across the twenty-year schedule is around $755,592, and across twenty-five years around $986,586. Five extra years of amortization costs roughly $231,000 in interest to save $485 a month. Neither is wrong in isolation. What matters is whether the lower payment is buying you room you genuinely need or simply lengthening the obligation because it was available.
Now the feature that surprises owners most: the amortization and the term are frequently different numbers. A conventional commercial mortgage may amortize over twenty years but mature in five, meaning the remaining balance is due in full at that point. On the loan above, that balloon is roughly $656,442 after five years — you'd have paid down about $94,000 of a $750,000 purchase and owe the rest at once. In practice you refinance, and usually that's routine. But you refinance at whatever rates and conditions exist in year five, not year one, and that is the single largest unpriced risk in commercial property borrowing. Longer fixed terms, where available, are worth paying for. Down payment matters too: SBA 504 structures can reach as little as 10% down against 20% to 30% conventionally, which on a $750,000 property is $75,000 rather than $150,000 or more of your own cash.
For owner-occupied purchases the first comparison should always be SBA Loans, since the 504 structure is purpose-built for exactly this and typically wins decisively on down payment and on the length of the fixed period — the trade is a slower close and more documentation. If the timing is the obstacle rather than the financing, Bridge Loans can carry you onto a property before a sale or permanent loan completes, at short-term pricing and only with a defined exit. And for a modest renovation or fit-out rather than a purchase, Business Term Loans avoid putting a lien on the property at all, which keeps your options open for the eventual acquisition.
The judgment that matters is about time horizon rather than about rate. Property makes sense when you can see the business occupying that space in ten years and the payment works comfortably at today's revenue, not at the revenue you're projecting. A business that might double, halve, or relocate within five years is usually better served by a lease and the flexibility it preserves. The desk's habit is to ask what happens to the building if the business changes shape — because the mortgage lasts longer than most business plans do, and the answer to that question should exist before the offer goes in.
Send the listing and your last two years
Email the property details and your financials — the desk will compare the SBA and conventional routes side by side.
It depends heavily on the structure. SBA 504 can reach as little as 10% for a qualifying owner-occupied purchase, while conventional commercial mortgages typically want 20% to 30%. On a $750,000 building that's a difference between $75,000 and roughly $150,000 to $225,000 of your own money, which is often the deciding factor in whether a business can buy at all rather than a detail about pricing.
It's the balance left over when a loan matures before it fully amortizes — very common in conventional commercial lending. It shouldn't frighten you, but it should be planned for. Know the maturity date, know roughly what will be outstanding then, and treat refinancing as a scheduled event rather than a surprise. The risk isn't the balloon itself; it's arriving at it with a property that has fallen in value or a business that has weakened.
For the products covered here, largely yes — these structures exist to help businesses own their premises, and SBA-backed purchases of existing buildings generally require you to occupy at least 51% of the space. You can usually lease out the remainder. If your plan is to buy primarily as a landlord, that's investment property financing, a different product with a different rate and down payment.
“Buy the building for the business you will have in ten years, not the one you have this quarter.”
Compare owning against renewing
A few questions about the property and your numbers, and you'll see what the payment and structure realistically look like.