SaaS Affiliate Program: Break-Even Math

Disclosure: This is a sponsored collaboration post. LokerDollar may earn a commission if you sign up for Reditus through links in this article. This does not change our analysis. We have not used the Reditus product ourselves; everything below about it comes from its public pages as of September 2026, so confirm current terms before you buy.

Most SaaS founders decide on an affiliate program with one sentence: "We only pay when someone converts." It sounds risk-free. It isn't. You pay in margin for 12 months or longer. You pay a platform fee before the first sale. You pay in the attention it takes to vet partners. Whether the channel is worth it is arithmetic, and you can do it before you write a line of program terms.

The four costs people forget

1. Commission over time. A "30% for 12 months" deal is 30% of twelve invoices, not one.
2. Platform fee. Most tools charge monthly. Some add a fee on processed payouts or revenue.
3. Cannibalization. Some affiliate-credited customers would have signed up anyway. Coupon sites and brand-search affiliates are the classic case.
4. Ops time. Approving partners, answering questions, handling payouts and disputes.

The model

For each customer the channel brings in:

first-year cost = (monthly price × commission % × months paid) + transaction fees

Then across the whole program:

break-even customers = annual platform fee ÷ (first-year revenue per customer − first-year cost per customer)

Then apply a haircut for cannibalization: multiply your affiliate-credited customers by the share you believe are truly incremental.

Worked example (hypothetical numbers, not LokerDollar data)

A SaaS charges $30/month and offers 30% recurring for 12 months.

• First-year revenue per customer: $30 × 12 = $360
• Commission: $360 × 30% = $108
• Assumed 5% fee on the commission (Reditus lists "5% credit card / 2% invoice" transaction fees, but its pricing page does not say what the fee is charged on, so this is an assumption): $5.40
• Net first-year revenue kept: $360 − $108 − $5.40 = $246.60
• Platform at $99/month = $1,188/year
• Break-even: $1,188 ÷ $246.60 ≈ 4.8, so 5 customers a year

Five is a low bar, and it proves less than it seems. It counts revenue, not gross margin. It ignores your time. It assumes every customer is incremental. If half your affiliate customers would have signed up anyway, you need about 10 credited customers before the channel pays off.

The same math shows where a plan's revenue cap bites. Reditus' Growth plan is capped at $60K ARR of affiliate-attributed revenue. At $360 first-year revenue per customer, that is roughly 167 customers. Past that you move to the next tier, listed at $399/month billed annually.

Three decision rules

• Fewer than about 5 expected affiliate customers a year? Don't buy a platform. Track manually with UTM links and a spreadsheet, or use your payment processor's basics.
• Is finding trustworthy partners the bottleneck? Recruitment matters more than tracking. That is the case for a marketplace or partner-discovery tool.
• Do your customers already love you? Try an in-app referral first. It costs less to run than recruiting outside partners.

Where Reditus fits

Reditus (affiliate link) is a platform for B2B SaaS that combines an in-app referral widget, affiliate tracking and payouts, and access to a network of affiliates it describes as 27,000+. Its site lists native Stripe integration, plus Paddle and Chargebee support and an API for other payment processors.

Its public pricing:

All plans list 5% (card) or 2% (invoice) transaction fees, and a 14-day free trial with no card is offered. Pricing scales with the revenue the program generates, which makes the break-even math above easy to apply.

The niche. Cheaper tools exist. Rewardful, FirstPromoter and Tolt list entry plans at roughly $29 to $99/month according to third-party comparisons we have not independently verified, and PartnerStack sits at the enterprise end. Reditus makes most sense if you want help finding affiliates as well as tracking them. It is a weaker choice if you already have partners and only need clean tracking.

Claims we can't verify. Reditus states "$11M+" generated through its network and publishes customer results such as Joiin's "€130K+ ARR". These are vendor-reported. We haven't checked them, and they are not a forecast for your program.

When Reditus is probably the wrong choice

• You're pre-revenue or have a very small customer base. Fees and setup time will outweigh the return.
• Your product sells to consumers. Reditus positions itself specifically at B2B SaaS.
• You want the lowest fixed cost. Compare plans on the fee structure, not the headline price.
• You need enterprise partner management (contracts, tiers, complex compliance). Evaluate the enterprise platforms.

Implementation steps

1. Fill in the model with your own price, margin, churn and commission.
2. Decide the offer: recurring vs. one-time, length, cookie window. Reditus' own July 2026 survey of 23 programs on its marketplace found cookie windows of 30 to 90 days.
3. Start the free trial of any tool you're considering. Test tracking end to end with a real Stripe test payment.
4. Recruit five partners by hand before you scale outreach.
5. Set fraud, self-referral and disclosure rules before the first payout.
6. Review at 90 days: incremental customers, payout cost, support hours.

Conclusion

A partner program is a pricing decision, not just a marketing one. Run the numbers first, because the answer changes with your price, your margin and how many partners you can realistically recruit. If they work, pick the cheapest tool that covers tracking and payouts, and add recruitment help only if partners are the bottleneck.