Also known as: Opt-out Rate, List Churn Rate, Email Opt-out Rate
The unsubscribe rate is the percentage of recipients who opt out of your email list after a given send, calculated as unsubscribes divided by delivered emails, multiplied by 100. It is the clearest single signal of whether your content and sending frequency match what your audience actually wants.
A healthy list churns slowly. Across most email-marketing benchmarks a per-campaign unsubscribe rate under about 0.2–0.5% is considered normal, while anything consistently above 0.5% signals a mismatch in relevance, frequency, or expectation. Because the metric is measured per broadcast, a single spike immediately after a specific email tells you that message crossed a line.
For an affiliate, unsubscribes are permanent lost inventory. Suppose you send to 10,000 subscribers and 20 opt out; that is a benign 0.2% rate. Now suppose you send three aggressive deposit-bonus emails in one day and 300 people leave — a 3% rate that erases weeks of list-building in an afternoon. Every one of those contacts was a future click on your broker link, so the real cost is the discounted lifetime commission you will never earn from them.
Unsubscribe rate should be read alongside spam-complaint rate and open rate. A rising unsubscribe number is actually the healthier failure mode — it is a clean, compliant exit. The dangerous alternative is subscribers who stop opening and instead hit the spam button, which damages your sender reputation and deliverability for everyone still on the list.
Every compliant marketing email carries an unsubscribe link. When a recipient clicks it, the email platform removes them from the active list and logs the event against that campaign. The platform divides those opt-outs by the number of emails successfully delivered — not sent — to produce the rate for that broadcast.
Comparing the rate across sends isolates cause. A stable baseline that suddenly triples after one email points straight at that message's subject line, frequency, or offer. Most platforms also let you offer a preference step before the final opt-out, so some would-be leavers instead reduce frequency, which keeps them on the list and preserves their future value to you.
Why it matters for partnership: Your email list is the compounding asset behind every future broker referral. Watching unsubscribe rate tells an IB when content or frequency is burning that asset, so you can slow down before you destroy long-term earning power for a short-term blast.
You email 10,000 subscribers on a MailerLite list and 20 opt out — a normal 0.2%. The next day you push three bonus-heavy broker promos and 300 leave, spiking the rate to 3%. At an estimated $15 average lifetime commission per subscriber, that day of over-sending quietly wiped out roughly $4,500 in future earning potential.
| Attribute | Unsubscribe | Spam complaint |
|---|---|---|
| User action | Clicks opt-out link | Marks as junk |
| Effect on you | Loses one contact | Hurts sender reputation |
| Deliverability impact | Minimal | Severe, affects whole list |
| Healthy threshold | Below ~0.5% | Below ~0.1% |
| Preferred outcome | Yes, clean exit | No, avoid at all costs |
Put a 'Manage preferences' link beside the unsubscribe so hesitant readers can drop to a weekly digest instead of leaving entirely — you keep the contact and the future broker click.
Hiding or breaking the unsubscribe link to slow list loss, which violates CAN-SPAM and GDPR and pushes frustrated users to hit the spam button instead, wrecking deliverability for your entire list.
Most email-marketing benchmarks treat a per-campaign rate below about 0.2 to 0.5% as healthy. Consistently higher rates suggest your frequency or content is out of step with what subscribers expected when they joined.
Not entirely. A clean unsubscribe removes an uninterested contact and protects your deliverability, which is far better than that person marking you as spam. It becomes a real problem when the rate spikes because a message annoyed engaged subscribers.
Send more relevant content, reduce frequency, segment your list so offers match interests, and set clear expectations at sign-up. Adding a preference center that lets people choose frequency also cuts full opt-outs.
Yes, and it is legally required. Once someone opts out you must stop sending marketing to them promptly, and reputable platforms suppress them automatically so you cannot re-add them by mistake.
Indirectly. High opt-outs signal poor engagement to mailbox providers, and if people choose spam complaints over unsubscribing, your sender reputation and inbox placement drop for everyone on the list.
Every mainstream email platform reports it per campaign in the send report, usually next to open rate, click rate, and spam-complaint rate.