How to Buy a SaaS Business: The Complete Playbook

How a small SaaS business actually makes money

The economics are simple to state and easy to get wrong. Recurring revenue arrives monthly or annually, cost of delivery is mostly hosting and support, and gross margins are high enough that the interesting question is never margin — it is whether the revenue stays. A SaaS business is a leaky bucket with a tap running into it. Price is set by how fast the bucket leaks and how reliably the tap runs without the founder standing over it.

That leads to three things a buyer should internalize before looking at a single listing. First, retention is the asset. Two products with identical current revenue can be worth wildly different amounts if one keeps customers for four years and the other for nine months. Second, the acquisition channel is half the business. Recurring revenue that requires constant replacement is only as good as the machine replacing it, and if that machine is the founder's Twitter following or a single affiliate partner, it does not transfer. Third, the codebase is a liability until proven otherwise. Every small SaaS carries deferred technical work; the question is whether it is a year of tidying or a rewrite you did not price in.

The better acquisitions tend to share an unglamorous profile: boring B2B software, embedded in a customer's workflow, sold on annual terms, found through search rather than through a personality, and maintained by code that someone other than the seller can read.

What does it cost to buy a SaaS business?

Small SaaS is priced on a multiple of ARR or of seller's discretionary earnings, and the range is genuinely wide:

• Micro-SaaS — a few thousand dollars in monthly recurring revenue, one founder, no team, often a single-purpose tool. These trade in the low-to-mid five figures and are frequently bought by operators who want a project rather than an income.
• Established small SaaS — six figures of ARR, documented retention, a support process, and more than one acquisition channel. These move into the six to low-seven figure range and are the core of the marketplace inventory.
• Team-run SaaS — a product with staff, real net revenue retention, annual contracts, and an owner who is not in the code. These command premium multiples because the buyer is acquiring a functioning company rather than a job.

The single most useful adjustment you can make to a headline multiple is to underwrite the retention curve, not the current ARR. Take the cohort data, project what today's revenue base is worth over the next three years with no new customers at all, and compare that to the asking price. If the deal only works assuming growth continues at the seller's historical rate, you are paying for the seller's execution rather than for the asset. Run the price through our business valuation guide and calculator, and be explicit about which earnings figure the multiple is being applied to — annualized recent months and trailing twelve months can differ dramatically in a product that is growing or shrinking.

Budget separately for the first year of operating cost, not just the purchase price. That means hosting, third-party services, support coverage, and — the item most buyers underestimate — engineering capacity. A product with no one maintaining it starts decaying immediately as dependencies, payment integrations, and platform APIs move underneath it.

Financing a SaaS acquisition

• Cash plus seller financing — the most common structure in small online deals. A held seller note keeps the previous owner invested in a transition that actually works; see our seller financing guide.
• Earnouts tied to retention — well suited to this category specifically, because the risk a buyer is taking is that revenue does not persist. Tying a portion of consideration to revenue retained twelve months out prices that risk honestly instead of arguing about it.
• SBA 7(a) — possible for US-domiciled businesses with a US buyer, and it does happen, but underwriting is harder than for asset-backed Main Street deals because there is little collateral. Our SBA acquisition-loan guide covers what lenders look for.
• Revenue-based and specialist lenders — a small set of lenders underwrite recurring revenue directly. Terms are typically shorter and more expensive than bank debt, so treat them as a bridge rather than a foundation.

What to inspect before you buy

• Revenue at the source — get read access to the payment processor and billing system and verify recurring revenue there, then reconcile it to bank deposits. Never underwrite off a seller-built spreadsheet. Separate one-time revenue, services revenue, and genuine subscriptions, because they do not deserve the same multiple.
• Cohort retention curves — by signup month, not blended. You are looking for whether the curve flattens and where. Ask for logo churn and net revenue retention separately, since expansion inside existing accounts can mask heavy customer loss.
• Revenue by customer — concentration matters as much here as in any B2B business. Find out what share the top accounts represent, when their contracts renew, and whether any relationship is personal to the seller.
• Acquisition channels — where signups actually come from over the last two years. Organic search, paid, marketplace or app-store listings, integration directories, affiliates, and founder audience should each be quantified. Any channel that is both dominant and outside your control is a concentration risk of its own.
• An independent code and infrastructure review — pay an engineer you trust. Scope it to architecture, dependency currency, test coverage, secrets handling, hosting cost and configuration, and how deployment works. This is the technical equivalent of an equipment appraisal and it is not optional for a non-technical buyer.
• Ownership of everything — code, repositories, domains, trademarks, design assets, and any contractor contributions. Confirm in writing that contractor work was assigned to the business rather than merely paid for, and inventory every credential, DNS record, and third-party account that must transfer.
• Third-party dependencies — APIs, platform integrations, and app-store or marketplace policies the product relies on. Software built on top of somebody else's platform inherits that platform's roadmap and its terms of service.
• Customer contracts and terms — look specifically for assignment and change-of-control clauses, auto-renewal terms, uptime commitments, and any data-protection obligations, particularly where customers are in regulated industries or in Europe.
• Support load — ticket volume, response times, and who answers. Support is the hidden operating cost that determines whether this is a passive asset or a full-time job.
• Security and data posture — incident history, access controls, backup and restore practice, and what customer data is held. A breach inherited at closing is your problem, and diligence is the only point at which you can price it.

Run all of it alongside the general business due diligence checklist, and follow the overall process in how to buy a business.

Pros and cons

Ready to look at listings?

SaaS businesses trade primarily through online-business marketplaces and specialist brokers rather than the Main Street channels where restaurants and machine shops are listed. Inventory turns quickly at the smaller end and slowly at the top, and the same product is often listed on more than one platform, so it is worth watching several. Compare the marketplace routes in our guide to online businesses for sale.

Related Guides