By Phillip Mitchell, Founder & Chief Brokerage Officer, AIExchange.club
Figures are as of October 2026, from the sources linked in the text and our own valuation guide. Examples are illustrations, not real deals. This is general information, not legal, tax or financial advice.
Most small software businesses don't lose money at the sale because the product is bad. They lose it because the owner can't prove the numbers, the accounts and code sit in the wrong names, or the business only works while the founder is in it. Each of those is fixable, and each takes longer than people expect. Counting back from the day you want to sell, start about 12 months out.
This guide is a month-by-month plan for the owner of a SaaS, app or AI business. It covers the books, the metrics buyers check, the legal and technical clean-up, the extra steps for AI products, and the data room. There's a free spreadsheet to track it all at the end of the timeline.
The 12-month plan at a glance
| When | Focus | What done looks like |
|---|---|---|
| 12 to 9 months out | Books and add-backs | Clean monthly profit and loss, personal spending separated, revenue tied to bank deposits |
| 9 to 6 months out | Metrics and the leaks | Churn, retention and customer concentration known and trending the right way |
| 6 to 3 months out | Contracts, code and accounts | Everything the buyer gets is owned by the company or by you, and can be transferred |
| 3 to 0 months out | Data room and go to market | One folder a buyer can review, a price range you can defend, a listing ready to publish |
12 to 9 months out: get the books clean
Buyers price a small software business on SDE, which is profit with your pay and one-off costs added back (see SDE vs EBITDA). They can only add back what you can show. So the first job is a monthly profit and loss that a stranger can read.
- Aim for three years of numbers, and at least two. Accounting guides for owners selling a business commonly say to allow 12 to 24 months of lead time and to have about three years of financial statements ready. A newer product has less history, which is fine; just have every month since launch.
- Separate personal spending. If your phone, laptop, travel or a family member's salary run through the company, list each one with a receipt. Documented add-backs raise SDE. Undocumented ones get ignored.
- Tie revenue to the bank. Export a full month from your payment processor, subtract refunds and fees, and compare it to the deposits. If the two don't match, find out why before a buyer does. Our due diligence checklist shows the same check from the buyer's side.
- Keep taxes and filings current. Late filings and sales tax gaps turn into price cuts or escrow holdbacks.
Here's why the add-backs matter, using an illustrative business:
| Line | Amount |
|---|---|
| Annual revenue | $120,000 |
| Hosting and AI model costs | -$30,000 |
| Tools and software | -$12,000 |
| Contractors | -$18,000 |
| Owner salary | -$36,000 |
| Reported profit | $24,000 |
| Add back owner salary | +$36,000 |
| Add back documented personal expenses | +$4,800 |
| SDE | $64,800 |
At a 3.0x multiple, $64,800 of SDE is about $194,400. If you can't document the $4,800 of personal expenses, SDE is $60,000 and the price is $180,000. Messy books cost $14,400 here, on a business with $120,000 in revenue.
9 to 6 months out: know the metrics buyers check
Buyers look at the same short list on every deal. Work them out now, while you still have time to move them.
- Monthly churn and retention. At 5% monthly churn you keep about 54% of customers over a year. At 2% you keep about 78%. That gap is what separates a business that holds its price from one that gets discounted. Net revenue retention shows you how to calculate it. For context, ChartMogul reports median gross revenue retention for AI-native companies at 40% (ChartMogul, December 2025), so a business that keeps most of its customers stands out.
- Customer concentration. If one customer is more than 20% of revenue, expect questions, a lower multiple or an earnout (see earnout).
- Revenue mix. Recurring revenue is worth more than one-off project work. Annual plans help.
- Acquisition cost and payback. A common benchmark is that a customer pays back what it cost to win them within about 12 months. If most of your growth is paid ads you can't explain, say so plainly in the listing.
- Traffic and where customers come from. A business that grows from search, referrals or email is easier to transfer than one that depends on the owner's personal audience.
One rule for this stretch: avoid big changes to pricing or the product in the last three months before you list. Buyers read the trailing 12 months, and a sudden price change or a churn spike makes that picture harder to read.
6 to 3 months out: contracts, code and accounts
Most small deals are structured as an asset sale, where the buyer takes the business's assets rather than the company itself (see asset sale vs stock sale). That means each asset needs a clear owner and a way to move. Go through this list:
- Code. The repository sits in a company or personal account you control, with no stray collaborators or unreleased secrets in the history. Anything written by contractors should be covered by a signed agreement that assigns the work to you.
- Domains, app-store accounts and social handles. Check that each is registered to you or the company, not a former freelancer. App-store developer accounts and payment-processor accounts have their own transfer rules, so find them early.
- Customer terms. Make sure your terms of service and privacy policy are published and that customer contracts don't block a transfer. Note any customer who has a custom deal.
- Open-source and third-party licences. List what the product depends on and under which licence.
- Data. Know what customer data you hold, where it's stored and whether you have the right to hand it to a buyer.
The asset purchase agreement guide shows how those assets get listed in the contract, and the LOI guide covers the offer that comes first.
If it's an AI product: four extra things buyers ask about
AI businesses carry risks that a plain SaaS doesn't. Our AI company valuation guide covers how this shows up in price. To prepare:
- Gross margin after model costs. Every model call is a cost that grows with usage, so it belongs in cost of goods sold. a16z's analysis puts AI companies' gross margins at 50% to 60%, against 60% to 80% or more for traditional software (a16z, published 2020, updated April 2024). Show your margin by month and what happens to it if usage doubles.
- Model provider dependence. If one provider runs the whole product, say so, and show how hard it would be to switch. A tested fallback to a second model is worth showing.
- Keys, prompts and accounts. API keys, prompt libraries, fine-tuned models and evaluation sets should live in accounts that can be handed over, not in your personal login. Rotate keys at closing.
- Data rights. If you trained or fine-tuned on customer data or scraped content, be ready to show you had the right to, and that the buyer can keep using the result.
Remove yourself from the business
A business that stops when the owner takes a week off is worth less than one that doesn't. In the last 6 months, write down how you do the recurring jobs: support, billing, deployments, customer onboarding. Record a walkthrough video for anything that's hard to describe. Move one or two routine tasks to a contractor or a tool and see whether anything breaks. Buyers will ask how many hours a week the business needs from you, and a documented answer lowers their risk.
3 to 0 months out: the data room and the price
- Build a data room. One folder with the financials, the metrics, the contracts, the account and code ownership proof, and the process documents. Buyers move faster and offer more when they can see everything in one place.
- Know your range. Run your SDE through the estimator below, then compare it with the multiples in the valuation guide. Know your lowest acceptable price before offers arrive.
- Decide what's included. Domain, code, customer list, social accounts, support inbox. Whether you'll stay on for a transition, and for how long, is part of the deal as well.
- Write the listing. Our guide to selling a SaaS business and the shorter one for selling an app walk through what a good listing says.
What's your SaaS worth?
= $120,000 ARR
45% of revenue is typical
Show the math
An estimate, not an appraisal. It can't see your code, your contracts, or your competitive position. Treat it as a starting range.
Get a full valuation →Mistakes that cost money
- Starting at the last minute. Cleaning books and moving accounts takes months, and buyers notice a rush.
- Overstating revenue or hiding churn. It comes out in diligence, and the price drops more than it would have with honest numbers.
- Treating personal spending as a business cost without receipts. You lose the add-back.
- Letting contractors keep the code rights. You can't sell what you don't own.
- Making big changes right before listing. It muddies the trailing numbers.
- Waiting for a perfect business. Some problems, like a dependence on one provider, can't be fixed in a year. Disclose them and price for them instead.
Download the checklist
We turned this guide into a spreadsheet you can fill in: every task by month, a status dropdown, an AI-specific section, a progress count and a sheet for working out your key metrics.
Frequently asked questions
How long does it take to prepare a business for sale?
Plan on about 12 months for a clean sale. A business with tidy books, owned accounts and a documented process can be ready in 3 to 6 months. One with mixed personal spending, informal contractors or unreconciled revenue needs the full year.
What documents do I need to sell a SaaS business?
Monthly financial statements for as long as you've traded, payment-processor exports, a customer and revenue breakdown, contractor agreements, proof of who owns the code, domain and app-store accounts, your terms and privacy policy, and a list of third-party tools and licences. The checklist spreadsheet lists them all.
Should I fix problems before I sell, or sell as is?
Fix what's cheap and quick, like paperwork, account ownership and documentation. For problems that take years to fix, such as a concentrated customer base, disclose them early and price for them. Buyers find issues anyway, and surprises cost more than disclosed flaws.
How is preparing an AI business different?
Mostly in four areas: gross margin after model costs, dependence on one model provider, who holds the API keys, prompts and fine-tuned assets, and whether you have the right to use the data you trained on. Buyers ask about all four.
Do I need a lawyer to sell my business?
For the purchase agreement, it's worth having one review it, especially for larger deals. On AIExchange.club, contracts are built into the platform and escrow is included, but we're not your lawyer, and you can still bring your own.
Next step
If you're ready to sell, listing on AIExchange.club is free, and the flat 10% success fee is only paid when your deal closes. The deal room, escrow and in-platform contracts are included (see fees and pricing). We list businesses that are already making money.
List your AI-powered business →
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