A newsletter is one of the most profitable places to recommend software. Your readers chose to hear from you, they read your emails in a calm moment, and a recommendation from someone they trust converts far better than any ad. You do not need a huge list: a few hundred engaged readers in a clear niche can earn real affiliate income.
Here is how to promote SaaS affiliate links in a newsletter without burning the trust that makes it work.
Check the rules first
Your email platform. Most newsletter tools, such as beehiiv, Kit, Substack, MailerLite and others, allow affiliate links. Some are stricter about certain niches or link shorteners, so check your platform's terms.
The affiliate program. Most SaaS programs are happy with email promotion, but some forbid it or ban specific practices such as unsolicited email, coupon claims or brand-name ads. Read the terms before you send. Never email people who did not subscribe to your list.
Five ways to place affiliate links in a newsletter
1. The dedicated recommendation. A full email about one tool: the problem it solves, how you use it, what it costs, who should skip it. Use this for your best tools, at most once or twice a month.
2. The "tool of the week" slot. A short, recurring section with one tool and two sentences on why it is useful. Readers come to expect it, and over a year it can promote dozens of programs without feeling salesy.
3. The tutorial with a tool inside. Teach something useful, such as "how I automate my invoicing", and the tool appears naturally in the steps. The value is the lesson; the link is a shortcut.
4. The resources page link. Add a permanent link in your footer to a page listing the tools you use. It works quietly in every email you send.
5. The welcome sequence. New subscribers are the most engaged. A short automated series that shares your favorite tools, spaced out over a couple of weeks, earns from every new signup for as long as it runs.
Write recommendations people act on
- Lead with the problem, not the product. "I was losing two hours a week chasing invoices" gets read. "Check out this invoicing app" gets skipped.
- Be specific. Show what you actually do with the tool, with real numbers or screenshots if you can.
- Say who it is not for. "Skip this if you send fewer than five invoices a month" makes the rest of the recommendation more believable.
- One clear call to action. One link, one button, one next step, such as starting a free trial.
- Mention the price honestly. Readers trust you more when you do not hide what something costs.
Pick programs that fit email
- Recurring commissions. Newsletter readers stay with you for months, and recurring programs let your income stack up the same way. Start with recurring programs.
- Tools your niche already needs. A marketing newsletter should promote marketing tools, not random high-paying ones.
- A long cookie. Readers often open an email, think about it and come back days later. See long-cookie programs.
- A free trial. It lowers the barrier for the first click.
The affiliate programs for newsletter creators page lists programs whose founders say they work well with email audiences.
Track what works
Use your email platform's click stats alongside each affiliate dashboard. Look at clicks per email, signups per program and which formats, whether dedicated, weekly slot or tutorial, earn the most. After a few months you will know which two or three programs deserve most of your space.
Disclose your affiliate links
Add a short line near the link or in every email footer: "Some links are affiliate links, which means I may earn a commission at no extra cost to you." It is required in many countries, including under FTC rules in the US, and readers appreciate the honesty.
Mistakes that cost newsletter affiliates money
- Too many links in one email. Five recommendations means none of them gets clicked.
- Promoting tools you have not used. One bad recommendation can cost you subscribers who will never come back.
- Sending sales emails only. Keep a strong ratio of useful content to promotion; the trust is the asset.
- Forgetting old emails. Your best-performing recommendation can be updated and resent to new subscribers.
Next step
List the tools your readers ask you about most. Look them up on AffiDex to compare commission, structure and cookie duration, then add a "tool of the week" section to your next issue. For the bigger picture, read our SaaS affiliate marketing guide.