Revenue-Based Commissions Can Be Misleading
Most affiliate programs set commissions as a percentage of revenue — "20% of each subscription payment." This is simple but can be misleading because it ignores the costs between revenue and profit. A 20% commission on a subscription where your actual margin is 30% means you are giving away two-thirds of your profit per customer.
Margin-based commissions create more sustainable economics by tying affiliate payouts to what you actually keep.
Understanding Your Real Margin
Before setting commission rates, calculate your actual margin per subscription:
Starting with a $9.99 monthly subscription:
- App store commission (15% to 30%): -$1.50 to -$3.00
- Payment processing (if web): -$0.59 (Stripe's 2.9% + $0.30)
- Server and infrastructure costs: -$0.30 to -$1.00
- Customer support allocation: -$0.20 to -$0.50
- Net margin: approximately $5.00 to $7.50 per month
A 20% commission on $9.99 revenue is $2.00 per month. That $2.00 represents 27% to 40% of your actual margin. If margins are tight, this could be unsustainable at scale.
The Margin-Based Approach
Instead of setting commissions on gross revenue, calculate them on your net margin:
- Determine your average net margin per subscriber per month (after all costs except acquisition)
- Decide what percentage of that margin you are willing to allocate to affiliate acquisition
- Set the commission rate accordingly
If your net margin is $6 per month and you are willing to allocate 30% to affiliate acquisition, your commission is $1.80 per month — equivalent to roughly 18% of revenue.
Why This Approach Is Better
Sustainability: Commission costs never exceed what your business can support. Even at high volume, your affiliate program remains profitable.
Platform fee awareness: Margin-based calculations automatically account for the app store's cut, which is the single largest cost for most subscription apps.
Consistent across pricing tiers: If your app has multiple subscription tiers with different margins, margin-based commissions adjust naturally. A higher-priced tier with better margins supports a higher commission.
International pricing: Apps with PPP-adjusted pricing for different markets have different margins per region. Margin-based thinking prevents overpaying commissions in lower-priced markets.
Communicating to Affiliates
You do not need to explain your internal margin calculation to affiliates. They see a commission rate — 18% of revenue, for example. The margin-based calculation happens on your side when you set that rate.
What matters to affiliates is the absolute dollar amount they earn per referral and how it compares to competing programs. If your margin-based commission rate is competitive, the fact that it was derived from margin analysis is irrelevant to the affiliate.
Adjusting as Margins Change
Margins evolve as your app grows:
- Qualifying for reduced app store fees (Apple's Small Business Program at 15% instead of 30%) improves margins and lets you increase commissions
- Scale efficiencies in server costs and support improve margins over time
- Price increases improve margins if costs remain stable
- Adding web payment options via Stripe dramatically improves margins versus app store billing
Review your margin calculation annually and adjust commission rates when significant margin changes occur. Always communicate rate changes to affiliates with advance notice.
Practical Implementation
Insert Affiliate lets you configure commission rates as percentages or flat amounts. Set your rates based on your margin analysis and adjust as your economics evolve.
The formula to keep in mind: Maximum sustainable commission = (Net margin per customer × Target affiliate acquisition share) / Revenue per customer.
This calculation ensures your affiliate program grows with your business rather than growing at the expense of your business.