PPC contracts with pay-for-performance (commission on sales, leads or profit) align interests, but have pitfalls: definition of the base, attribution, data, duration, exit. Understanding the structures, risks and essential clauses is the difference between a fair model and a dispute.
The essentials in a definition
PPC contracts with pay-for-results pricing tie remuneration to leads, sales or profit, instead of to hours or a percentage of spend. They align interests, but require rigorous definitions of result, data and responsibilities, plus clear payment rules. When the contract is with consumers, rules on information and commercial practices apply (Unfair Commercial Practices Directive, Consumer Rights Directive), and the European Commission gathers information.
Common structures
A percentage of sales attributed to the ads. Payment per lead or per qualified lead. A percentage of the increase in revenue or profit against a baseline. Hybrid models: fixed plus variable. Each structure distributes risk differently between client and provider.
None is perfect; all depend on how they are defined.
Main risks
Disagreement about what counts as a sale or lead. Disputed attribution (who brought the customer). Lack of access to data for verification. A poorly defined baseline (what would have happened without the provider). Distorted incentives: maximising what is paid for and not what matters to the business. Seasonality and external factors.
Conflicts in such contracts tend to arise when results are good.
Clauses of a pay-for-performance contract
- Define the calculation base and data sources
- Agree attribution and baseline
- Set caps, minimums, deadlines and audit
- Start with a limited pilot
Essential clauses
An exact definition of the calculation base and data sources. Attribution and reconciliation method. Baseline, how it is calculated and revised. Caps and minimums. Payment terms. Client access to accounts and data. Duration, termination and ownership of accounts. Confidentiality and data protection. Audit of the numbers.
Seek legal support to draft and review.
In performance contracts, what is not defined becomes an argument.
When it makes sense
When the client has reliable data, sufficient margin and trust, and the provider can influence the result. Often a hybrid model (fixed plus variable) balances risks better. Start with a limited pilot before signing a long contract.
Review the model against results.
Decision table
| Model | Advantage | Risk |
|---|---|---|
| Price per lead | Predictable cost per contact | Focus on volume, not quality |
| Price per sale | Aligns with the business | Dependence on factors beyond the agency’s control |
| Share of incremental profit | More aligned with value created | Needs measurement accepted by both parties |
| Mixed (base plus variable) | Balance of risk | More complex to define |
Common mistakes to avoid
- Vague definition of result. Lead, sale and profit must be defined in writing.
- No access to data. Both parties must be able to verify the numbers.
- Ignoring quality. Price by volume may encourage weak leads.
How to measure the result
Track defined results, lead quality, total cost and both parties’ satisfaction, and review the model every six months.
Limits and exceptions
Results depend on factors the provider does not control (product, price, sales), and fully variable models can disincentivise investment or lead to shortcuts. This content is informational and not legal advice; consult a professional when drafting the contract. Test the model in a pilot period before fixing it.
Illustrative example
Illustrative example: a company and a provider agree a base fee plus a variable per qualified lead, with a written definition of “qualified”, shared CRM access and monthly reviews. Lead quality improves, and both sides have an incentive to track close rate. Exit and audit clauses avoid conflicts.
Frequently asked questions
Is pay-for-performance always better?
No. It depends on data, margin and trust. A hybrid model can be more balanced.
Who accesses the data?
The client should have access to the accounts and the data that determine payment.
Do I need legal support?
It is recommended to draft and review the clauses.
Is pay-for-results better?
It depends on the business; it aligns interests, but needs accepted measurement and clear definitions.
Which clauses are essential?
Definition of result, data access, payment terms, audit, exit and data protection.
Pay-for-results contracts work when the result is defined in writing, data are shared and verifiable and there are audit and exit clauses.
Sources and recommended reading
- Unfair Commercial Practices Directive (2005/29/EC)
- Consumer Rights Directive (2011/83/EU)
- European Commission: consumer rights
Last editorial review: October 2026. Informational content; always confirm current conditions in the official sources before deciding.