Glossary
Earn-Out: What It Is, How It Works, and When Buyers Use It
An earn-out is a deal term that pays part of the purchase price later, and only if the acquired business hits agreed performance targets after closing. It lets a buyer and seller agree on a price today without the buyer paying up front for results that have not yet happened.
Whether an earn-out actually pays, and whether it ends in a dispute, depends on four design choices: the metric, the measurement period, the accounting definitions and the dispute mechanics. The financial model and legal wording need to describe the same test.
How does an earn-out work?
The purchase price is split in two. One part is paid at closing. The rest is contingent: the seller receives it only if the business meets defined milestones, usually revenue, gross profit or EBITDA targets, over a set period after close. The metric, the target, the period and the payment schedule are written into the purchase agreement.
A simple illustration: a buyer agrees to a headline price, pays most of it at close, and agrees to pay the balance if revenue over the next two years reaches an agreed level. If revenue falls short, the balance is reduced or not paid, depending on how the clause is written.
Why do buyers and sellers agree to earn-outs?
Earn-outs appear where two conditions meet: a valuation gap and earnings that have not yet proved durable.
A valuation gap.
The seller believes the business is worth more than the buyer will pay on today’s evidence. Instead of walking away or accepting a straight price cut, both sides spread the difference over time. The seller earns the fuller number if the business delivers; the buyer limits its downside if it does not.
Unproven earnings.
A short trading history, concentrated customers or dependence on the owner all carry real uncertainty. A quality of earnings analysis tests the support for historical numbers within its agreed scope. It cannot confirm that revenue continues once the seller steps back. An earn-out moves part of that transition risk to the seller.
Our transaction team has discussed both earn-outs and forgivable seller notes when a buyer and seller disagree about future performance. The distinction is whether the deferred amount is already owed or must still be earned. BDC explains the same distinction in its overview of business-sale financing.
What are the four decisions that decide whether an earn-out works?
The table below sets out each decision, the usual options, what the diligence numbers should show before you commit, and who settles it. It is a planning framework, not a drafting guide. The clause itself belongs with your lawyer.
| Decision | Common options | What the numbers should show first | Who settles it |
|---|---|---|---|
| Metric | Revenue or bookings; gross profit; EBITDA; customer-specific revenue; non-financial milestones | That the metric can be measured from the books that will exist after close, and how much of it the buyer will control. Revenue and bookings are harder to move with post-close cost decisions than EBITDA. | Financial adviser on measurability and baseline; parties agree commercially |
| Measurement period | One period or several; annual tests; cumulative over the period; catch-up provisions | Seasonality and revenue cycles, so the period does not end on an unrepresentative month. Contract renewal dates for any key customer. | Parties, with financial input on timing |
| Accounting definitions | Same policies as the diligence baseline; a named accounting framework; specific treatment of revenue recognition, allocations and one-off items | The restated historical figure the target is measured against, with an explicit decision on which diligence adjustments also belong in the future metric. | Financial adviser drafts the definitions schedule; lawyer incorporates it |
| Dispute mechanics | Who prepares the earn-out statement; what the seller can inspect; deadlines to object; an independent accountant for unresolved items | That the metric can be recomputed by a third party from records the seller will be allowed to see. | Lawyer, with the accountant’s role defined in the agreement |
Two points sit behind the table.
The metric changes the allocation of risk. When a seller wants to hold their valuation, our transaction team’s advice has been to tie the contingent portion to the top line, such as revenue or membership bookings, rather than net income or EBITDA. Post-close EBITDA depends on decisions the buyer controls: overhead allocation, the new owner’s pay, investment in growth. A seller whose payment rides on EBITDA has handed the buyer real influence over their own payout.
The baseline must be measurable on the agreed basis. Setting a target against a presented figure that later drops is how an earn-out becomes unreachable on the day it is signed. Agree the concept in the letter of intent if you need to, but finalize the numbers once the quality of earnings work has established what the business actually earns.
When does an earn-out make sense, and when is something else cleaner?
An earn-out is one of several ways to share risk. The right one depends on what is actually uncertain.
| What is uncertain | Instrument often considered | Why |
|---|---|---|
| Overall growth the seller is forecasting | Earn-out on revenue or gross profit | The seller is paid for the growth they claim, if it arrives |
| Whether one or a few large customers stay | Forgivable seller note tied to those customers’ revenue | Narrower and simpler to measure than a whole-business earn-out |
| Cash the buyer needs to service debt | Seller note with standby terms | Defers payment without making it contingent on performance |
| Known liabilities found in diligence | Holdback or escrow | Covers a specific exposure rather than future performance |
In a review of a completed acquisition, our transaction lead recalled recommending a forgivable seller note tied to a concentrated customer relationship. He also described the customer pausing work after the buyer took over, putting pressure on cash flow. The distinction was between a contract remaining in place and revenue actually arriving from it. A trigger based only on retaining the contract could miss that exposure.
If concentration is the risk you are weighing, read customer concentration risk and seller notes. For specific exposures found in diligence, see holdbacks and escrow.
Can both parties calculate the same payout before signing?
Test the clause on a small set of invented numbers. Suppose an earn-out pays 20% of revenue above CAD 2 million during one year, capped at CAD 100,000. At CAD 2.3 million of eligible revenue, the payout is CAD 60,000. At CAD 2.7 million, the formula gives CAD 140,000 but the cap limits payment to CAD 100,000.
Now change just one assumption: CAD 100,000 of the first scenario’s revenue has been invoiced but not collected. A revenue trigger still gives CAD 60,000 if that revenue meets the agreed recognition rules. A collected-revenue trigger gives CAD 40,000 if the unpaid amount is excluded. Neither definition is interchangeable with bookings. Decide how refunds, cancellations, tax, related-party sales and late collections are treated before relying on the number.
Top-line metrics reduce the influence of cost allocations, but leave other choices in the buyer’s hands: pricing, discounts, customer routing and the timing of delivery. EBITDA also captures the cost of generating revenue. The right metric follows the risk being shared and the records both parties can inspect.
How does quality of earnings work shape an earn-out?
Directly. When an earn-out is on the table, the diligence becomes more targeted. The question is not only whether adjusted EBITDA is accurate, but which parts of it are durable. We look for the patterns that point toward contingent consideration: revenue concentrated in one customer, an earnings history that is short or lumpy, and deferred revenue the seller may try to collect ahead of close.
Earn-outs also sit alongside other protections: a net working capital peg, a debt-like items schedule, a closing date chosen to avoid deferred-revenue disputes. Each addresses a different slice of the same risk. A quality of earnings helps identify the financial exposure and establish a baseline; it cannot establish which protection will succeed.
Our transaction advisory team gives input on structure where it is a financial question: whether a metric is measurable, what baseline is defensible, and how it interacts with working capital and debt-like items. We do not draft or negotiate legal terms, indemnities or liability caps. Those run through your lawyer, and we work alongside them.
Frequently asked questions
What is an earn-out in a business acquisition?
A deferred, contingent part of the purchase price. It is paid only if the acquired business meets defined financial or operational targets after closing, which lets the parties bridge a valuation gap without the buyer paying up front for performance that has not yet happened.
What metric should an earn-out be based on?
Whichever is hardest to manipulate and easiest to verify from the books that will exist after close. Revenue, bookings and customer-specific triggers can reduce disputes about post-close cost allocations, but they still need definitions and safeguards. EBITDA may fit other commercial aims. Assess the records, control over the metric and the parties’ objectives with your advisers.
How is an earn-out different from a seller note?
A seller note is a debt the buyer owes regardless of performance, unless specific conditions apply. An earn-out is contingent from the start. A forgivable seller note sits between the two and is sometimes the simpler instrument when the risk is concentrated in a few customers.
Should earn-out targets be set before or after diligence?
The concept can be agreed in the letter of intent. The numbers should wait until diligence establishes the real baseline. Setting targets before the quality of earnings is complete is working backwards.
Is an earn-out legally enforceable as written?
That is a question for your lawyer. This page explains the financial design choices only and is not legal advice. Enforceability, drafting, buyer conduct covenants and dispute clauses should be settled with counsel.
Where to next
If price is what stands between you and a signed deal, have the structure conversation before conceding on value. Our transaction advisory services team sets the baselines these structures depend on. For the term-by-term detail, read earnout structure; for how the numbers are tested, see buy-side due diligence. To check how ready a business is for diligence, try the QoE readiness check.
