SaaS businesses look like cash machines on the surface. Recurring revenue, low churn, minimal physical assets. Buyers get excited and overpay before they ever open the financials.

Gross margin is the number that separates a real SaaS business from a thinly disguised services company with a software veneer. Get this wrong in due diligence and you will inherit a business that looks profitable at the top line and bleeds at the bottom. And that bleed shows up fast, usually within the first two quarters of ownership when the hosting bills and support headcount start hitting your actual P&L instead of the seller’s proforma.

Here is what SaaS gross margin actually means for acquisitions, how it shapes your deal structure and SBA underwriting, and what good looks like versus what should make you walk.

What SaaS Gross Margin Actually Measures

SaaS gross margin is the percentage of revenue left after subtracting the direct costs of delivering the software. The formula is straightforward: revenue minus cost of goods sold, divided by revenue, expressed as a percentage.

The tricky part is what counts as COGS for a SaaS company. It is not raw materials or physical inventory. For SaaS, COGS typically includes hosting and infrastructure costs (AWS, Azure, Google Cloud), third-party software licenses embedded in the product, customer support costs directly tied to delivering the service, payment processing fees, and onboarding labor if it is required to get customers live.

Everything else sits below the gross margin line. Sales, marketing, product development, G&A.

A SaaS business with 80% gross margin keeps $0.80 of every revenue dollar after paying to deliver the product. That remaining $0.80 funds everything else: growth, operations, working capital needs, debt service on your acquisition loan. It is the pool of money that makes or breaks the deal.

What Good SaaS Gross Margin Looks Like

The benchmark for a healthy SaaS business is 70% to 85%. That is the range where lenders and buyers feel comfortable underwriting the acquisition.

Best-in-class pure software businesses run 80% to 90%. Think products that are mostly automated, have low support overhead, and run on efficient cloud infrastructure. These are the businesses that justify the multiples you see on BizBuySell and in broker CIMs.

Below 70% starts to raise questions. Below 60% and you are looking at a business that has significant service components, high infrastructure costs, or a pricing model that does not work at scale. Not necessarily a deal-killer, but it changes the math completely.

Here is a specific example. Say you are evaluating a $2M ARR SaaS company listed at $4M. If gross margin is 80%, you have $1.6M in gross profit to work with. If gross margin is 55%, you have $1.1M. Same top line. Same listing price. But the second business has $500K less per year to cover sales, support, R&D, working capital reserves (which you need, typically 2 to 6 months of operating expenses set aside at close), and your debt service. At a $4M acquisition price with SBA 7(a) financing, your annual debt service runs roughly $400K to $450K on a 10-year note. A 55% gross margin business can make that math very tight or outright impossible to underwrite.

The Part Most Buyers Skip

Before we get into lender mechanics and deal structuring, there is a more basic question worth sitting with: why does gross margin matter more for SaaS than for the traditional businesses most acquisition buyers are used to evaluating?

When we look at traditional businesses like HVAC companies, laundromats, or distributors, COGS includes labor and materials that scale linearly with revenue. You sell more, you spend more to deliver it. That is expected.

SaaS is supposed to work differently. The core value proposition is that you build the software once and sell it repeatedly. Marginal cost of an additional customer should be near zero. That is the model that justifies SaaS multiples in the 3x to 6x ARR range.

But if a SaaS company’s gross margin is 55%, that thesis breaks down. It means the business is spending heavily to deliver the product for each incremental customer.

Could be heavy per-client customization, which makes it more of a services company than a software company. Could be infrastructure that was never optimized and costs balloon with usage. Could be expensive embedded third-party licenses the company cannot renegotiate. Could be support that has to scale with the customer base because nobody automated it.

Any of those is a problem. Some are fixable post-close. Some are structural and baked into the product architecture.

Knowing which is which requires digging into the COGS line items during due diligence. Do not just accept the headline gross margin number.

How SBA Lenders View SaaS Gross Margin

SBA 7(a) lenders do not underwrite to ARR or gross margin in isolation. They underwrite to debt service coverage ratio. But gross margin feeds directly into DSCR, and that chain matters.

Here is how it flows: revenue minus COGS equals gross profit. Gross profit minus operating expenses equals EBITDA (or SDE for owner-operated businesses). SDE divided by annual debt service equals DSCR.

The SBA requires a minimum 1.25x DSCR, but that number is dangerous. Most lenders want 1.5x before they get comfortable. We target 2x on deals we take forward, and for good reason. At 1.25x, one bad quarter, one unexpected infrastructure cost spike, one key customer churn event, and you are underwater on your debt service. That is not a margin of safety. That is a margin of hope.

A SaaS company with high gross margin has more room to absorb operating expenses and still produce sufficient SDE. A low gross margin company has to operate with extreme efficiency below the gross profit line just to clear underwriting.

We have seen SaaS deals where the ARR looked attractive and the multiple seemed reasonable, but gross margin in the low 60s compressed SDE enough to push DSCR under 1.3x. Those deals required a lower purchase price, a larger seller note (ideally on full standby at 0% interest, which we achieve on roughly 90% of our deals), or a creative earnout structure to make them work. None of those conversations are fun after you have already spent 8 weeks in diligence.

Add-Backs and Adjusted Gross Margin

When you receive a CIM or financials from a SaaS seller, the gross margin figure may not reflect normalized operations. This is where proof of cash becomes essential.

Sellers add back one-time infrastructure costs, migrations, or custom development work that hit COGS in a specific year. Some of these add-backs are legitimate. A one-time server migration that cost $80K and will not recur is a fair adjustment.

Others are not.

If a company adds back $150K in customer success costs because “the team was being rebuilt last year,” that is not a clean add-back. Those costs are likely to recur. New owners rarely shrink customer success teams in the first year of ownership.

Push sellers on every COGS add-back. Ask for the underlying invoices. If the numbers on the invoices do not tie to the bank statements and the tax returns, you have a proof of cash problem, and that means you cannot trust the gross margin figure at all. (This is also why we insist on proof of cash as part of our standard diligence process. If it does not tie, we walk.)

The same discipline applies to hosting costs. Some sellers present gross margin using monthly average hosting costs. If the business has seasonal traffic spikes that create cost peaks, the average understates the real COGS picture.

Your goal is adjusted gross margin based on run-rate, normalized operating conditions. That is the number that reflects what you will actually inherit.

A SaaS business with 75% gross margin today is a fundamentally different acquisition if that margin was 82% three years ago versus if it was 68% three years ago.

Declining gross margin is a warning sign. It can mean infrastructure costs are growing faster than revenue, that support overhead is scaling inefficiently, or that the product requires more expensive resources to maintain as the customer base grows.

Improving gross margin tells a different story. The business is getting more efficient. Infrastructure costs are being optimized. Support is being automated.

That is a business where you can underwrite real upside.

Always pull gross margin by year for at least the prior 3 years. Plot the trend. Ask the seller to explain any meaningful movement. This single exercise will surface more deal-killing issues than most other diligence work you will do on a SaaS acquisition. Three years of data. Minimum.

What to Do When Gross Margin Is Low

If you find a SaaS business with gross margin below 65%, you have a few options before walking away.

First, understand the cause. If it is infrastructure inefficiency, that is often fixable post-close. Cloud infrastructure is highly optimizable, and a competent technical operator can frequently reduce hosting costs by 20% to 40% within 12 months. We have seen this play out enough times to know it is real, but it is not guaranteed, and you should not underwrite to an optimistic post-close cost reduction.

Second, adjust the purchase price. Low gross margin should compress your multiple. If clean SaaS businesses at 80% gross margin trade at 4x ARR, a 60% gross margin business should trade closer to 2.5x to 3x. Price reflects risk. Structure matters more than price in many deals, but the price still has to make sense for the underlying economics. Meet on price if you need to, but win on terms: seller note on full standby, working capital included in the deal, favorable earnout triggers tied to margin improvement.

Third, run the DSCR math at the current gross margin. Not an optimistic future state. If the deal works at current economics, any improvement is upside you get for free. If you need margin improvement to clear debt service, you are betting on execution you do not control yet.

We use a 1.5x DSCR floor as our absolute minimum threshold on SaaS deals, with a 2x target. If the deal cannot clear 1.5x at current gross margin, it needs to be repriced or restructured before we advance it. No exceptions.

Frequently Asked Questions

What is a good gross margin for a SaaS business acquisition?

A strong SaaS gross margin for acquisition purposes is 70% to 85%. Best-in-class businesses with highly automated delivery and efficient infrastructure can run 85% to 90%. Below 70% warrants a close look at cost structure and the multiple being asked. Below 60% typically means the business has significant service components and should be priced accordingly, usually at a compressed multiple.

How does SaaS gross margin affect SBA 7(a) financing eligibility?

SBA lenders underwrite to debt service coverage ratio, not gross margin directly. But gross margin flows into EBITDA and SDE, which drive DSCR. Low gross margin compresses SDE, which tightens debt service coverage. A SaaS deal that cannot clear a 1.25x DSCR will not get SBA financing at all, but that floor is not where you want to be. We target 2x DSCR with a 1.5x minimum on every deal we take forward.

Can you acquire a low gross margin SaaS business with SBA financing?

Yes, but the purchase price has to reflect the margin profile. A 58% gross margin SaaS business can still qualify for SBA 7(a) financing if the SDE generates sufficient debt service coverage. The issue is most sellers price low-margin SaaS at the same multiples as high-margin businesses. Your job in negotiation is to correct that pricing based on the actual economics the lender will underwrite.

What costs should be excluded from SaaS COGS?

Sales and marketing, R&D and product development, and general administrative costs should sit below the gross profit line. COGS should include only costs directly tied to delivering the software: hosting, infrastructure, embedded third-party licenses, direct customer support, and payment processing. If a seller includes R&D in COGS to inflate the gross margin appearance, that is a red flag worth challenging during diligence.

How do you calculate DSCR for a SaaS acquisition?

Take the seller’s discretionary earnings or EBITDA from the SaaS business, adjusted for recurring owner compensation and any legitimate add-backs. Divide that by the annual debt service on your SBA loan. On a $2M SBA loan at current rates with a 10-year term, expect annual debt service in the range of $230K to $260K. A business producing $450K in SDE would clear a 1.7x to 2x DSCR, which puts it in solid underwriting territory.

Looking at a SaaS Deal Right Now?

Regalis Capital advises buyers through the full acquisition process, from deal evaluation and SDE normalization to SBA structuring and close. We look at more than 120 deals per week and know how to separate a real SaaS acquisition from a margin story that does not hold up under actual diligence.

If you are serious about acquiring a SaaS business and want a team that runs these numbers every day, start here.