Commission Models
Affiliate commission structures and margins
Choose percentage, fixed and conditional affiliate commissions using eligible order value, contribution margin and clear payout rules.
Choose an affiliate commission structure by working backwards from what eligible orders can afford. Define what earns payment, calculate the amount available after order costs and the contribution you need to retain, then choose a percentage, fixed fee or conditional rates. A headline rate that works on a full-price order may fail on a discounted or low-margin basket.
Define what earns commission
For a retail sale, state whether commission applies to the whole order or only eligible items. Define the treatment of discounts, delivery charges, cancellations, partial refunds and mixed baskets. Use a consistent GST basis in the commercial calculation and the payout rule. A lead or subscription renewal needs its own qualifying event.
Write the calculation basis beside the rate in the partner terms. “8% commission” does not tell a publisher whether a sale item, delivery charge or returned product counts.
Payout terms can distinguish between a percentage of the whole order and a percentage calculated per item; fixed payouts can also be set per order or per item. Choose the unit that matches the eligible event, then state it explicitly so the rate cannot be read differently from the intended order basis.
A default payout can determine what applies when no specific payout group, adjustment, restriction or performance bonus applies. Record the default alongside any conditional rates, so the amount payable in an uncovered case is visible before the offer is made.
Choose a structure
| Structure | Useful when | Main margin risk |
|---|---|---|
| Percentage of eligible sale value | Payment should move with order value | A large, low-margin basket can attract a large payout |
| Fixed fee per approved acquisition | The qualifying outcome can support the same fee across covered orders | A small order carries the same fee as a larger one |
| Rates by product or customer status | Eligible orders have materially different economics | Missing data or a fallback rule can apply an unintended rate |
| Recurring payment | Later qualifying payments are part of the agreed reward | The total obligation can exceed the first-order allowance |
A percentage-based commission rises with eligible order value, while a fixed fee stays the same regardless of order value. Compare the expected mix of eligible orders before choosing either structure.
A tier or temporary uplift needs a clear trigger and effective period. Count any separate placement fee when assessing the relationship’s total cost, and describe it separately from commission on an approved sale.
Affiliate Commission Structures: Pros and Cons
- Percentage of Eligible Sale ValueCommission scales with order value; good for high-value baskets. Risk: high payouts on low-margin or discounted orders.
- Fixed Fee per Approved AcquisitionPredictable cost regardless of order size. Risk: same fee for small and large orders, may not reflect value.
- Rates by Product or Customer StatusTailored to different economics (e.g., new vs returning customers). Risk: misapplication if data is missing or conditions overlap.
- Recurring PaymentReward for ongoing customer value (e.g., subscriptions). Risk: total payout can exceed initial order allowance.
Use conditional rates only for meaningful differences
Awin notes that Commission Groups are currently available only on Awin Classic. Commission groups can vary rates by product category, customer type, device type or other tracking conditions, including product ID and custom parameters. These criteria can support a programme structure that reflects different order economics, but each rate still needs a clear calculation basis and a rule for cases where criteria overlap or data is missing.
Available group capacity can depend on the Awin plan. Awin Access allows up to three commission groups, including Default; Awin Accelerate and Advanced allow unlimited groups and access to more conditions. Check that the planned structure fits the account’s available options before making a rate commitment.
Key Commission Structure Limits in Australia
- Awin Accelerate & Advanced Plans – Unlimited GroupsUnlimited commission groups with advanced conditions
- GST Treatment on Cross-Border SalesAustralian businesses must account for GST on digital services sold to local customers, even if provider is overseas
- Common Exclusions in Australian Affiliate ProgramsDelivery charges, gift cards, refunds, and non-GST items are often excluded from commission eligibility
Set a margin limit
For each relevant order group, start with revenue after discounts. Subtract the costs of supplying and fulfilling the order, payment costs, a defensible allowance for returns and other variable costs. Reserve the contribution the business needs to keep. The remainder is the amount available for publisher commission and any commission-linked programme cost.
Check ordinary low-margin cases as well as bestsellers: discounted orders, small baskets and orders containing eligible and excluded items. Where economics differ materially, consider a narrower eligibility rule, an item-level basis or a separate rate. For subscriptions, compare the total possible publisher obligation with expected contribution over the same qualifying periods; projected renewals are uncertain.
Setting Affiliate Commission Margins: Step-by-Step
- Start with revenue after discountsCalculate net order value post-promotions.
- Subtract fulfilment and supply costsInclude product cost, shipping, payment processing fees.
- Allow for returns and variable costsFactor in a defensible return rate and other operational expenses.
- Reserve required contribution marginEnsure the business retains its target profit before commission.
- Determine available commission poolRemaining amount is what can be paid to affiliates.
Check the rule that will apply
Conditional rates require the right order data and a suitable fallback. A new-customer rate depends on a reliable customer-status value; a product rule depends on usable item data. Check missing fields, overlapping conditions and mixed baskets against the proposed configuration.
Rules differ by provider: Awin documents a mandatory Default Commission Group for every programme. impact.com documents a default payout when no payout groups, adjustments, restrictions or performance bonuses apply. Tapfiliate says Extra Commission Types can be implemented with WooCommerce, JavaScript or REST API integrations; JavaScript or REST API may require developer involvement.
Before offering a rate, calculate the expected payout for a full-price order, a discounted order, a mixed basket, a new customer, a returning customer and a later refund. Compare those expectations with the configured rules during implementation.
Pre-Launch Commission Rules Check
- Confirm reliable customer-status trackingEnsure new-customer data is accurate and consistent across platforms
- Verify item-level data availabilityCheck that product category or ID data is consistently passed to the affiliate platform
- Test mixed basket scenariosValidate commission rules when eligible and excluded items appear together
- Define fallback rule for missing dataSet a default rate (e.g., Default Commission Group) to avoid undefined payouts
- Review refund and cancellation impactEnsure commissions are adjusted or reversed correctly post-refund
Explain the offer
Give publishers a short schedule showing the payable event, calculation basis, rate or fee, exclusions, customer-status definition where relevant, and the treatment of changed or cancelled orders. State when a new rate takes effect and check the applicable provider terms for notice requirements. Keep the cost assumptions behind each rate and review them when prices, discounts, costs or customer mix change.
If using impact.com Template Terms, the selected currency and event type form part of the payout setup, and multiple event types can be added. Partners who apply to a programme or accept terms sent to them enter a legally binding contract, so ensure the stated rate, basis and conditions match the intended commercial offer.
A descriptive terms name is visible to partners, while optional labels are for internal searching and are not shown to partners. This makes it practical to distinguish terms with different rate schedules internally without relying on an ambiguous name in the partner-facing offer.
In this guide
- Percentage commissions versus fixed acquisition feesCompare percentage affiliate commissions with fixed acquisition fees using order values, a crossover point and contribution guardrails.
- Calculating a sustainable commission from contribution marginWork out an affiliate commission ceiling from eligible revenue, variable order costs and the contribution your business needs to retain.
- Setting commissions for new versus existing customersDefine new and existing customers, price each order group and check the data and fallback behind customer-status commissions.
