Affiliate Tracking
How to Track Affiliate Sales With Sub-IDs and Revenue Attribution
Set up Sub-ID-based affiliate tracking so you can compare placements, creators, and offers by clicks, conversions, revenue, cost, and ROI.
Tracly Team · August 23, 2026 · 9 min read
Direct answer
Track affiliate sales with Sub-IDs by assigning a distinct identifier to each traffic slice, sending clicks through one tracked URL, and storing conversions and revenue against that identifier. The useful report shows which Sub-IDs produced profitable sales, not just the most clicks.
When every partner click lands in one undifferentiated bucket, profitable traffic and weak traffic look the same. Sub-IDs solve that by tagging the placement, creator, ad, or content variation that generated the click before the sale ever happens.
| Reporting view | Approach one | Approach two |
|---|---|---|
| Reporting view | Campaign-only: totals for the whole promotion | Sub-ID view: each placement or source gets its own line |
| Best decision | Pause or scale the broad campaign | Scale, edit, or cut a specific traffic slice |
| Blind spot | Profitable sources can hide inside averages | Weak segments are easier to isolate and fix |
Give every traffic slice an ID before the click happens
A Sub-ID only helps if it is assigned deliberately. Decide what it represents before launch: a creator, placement, ad set, keyword cluster, newsletter slot, or landing page variation. If the label changes meaning halfway through the campaign, the report becomes hard to trust.
Use short, human-readable IDs that remain stable across the test window. A clear naming rule makes exports easier to sort and keeps multiple buyers or partners from creating overlapping codes for different things.
- One Sub-ID meaning per campaign
- A naming format your whole team can follow
- No personal or sensitive customer information in the URL
Send every click through a tracked link that preserves the Sub-ID
The link needs to do two jobs at once: route the visitor to the right destination and record the Sub-ID with the tracked click so later reporting can separate that traffic slice. If the identifier is never captured at click time, the eventual conversion has no reliable Sub-ID source line.
This is why Tracly's current Sub-ID workflow is practical for affiliates. You can create dedicated tracking links, attach a `sub_id` value to the campaign URL, and then read clicks, conversions, revenue, cost, profit, and ROI back in one performance table.
- Test the full redirect before spending budget
- Verify Tracly records the expected Sub-ID on the click
- Confirm one sale is counted once against the intended Sub-ID
Judge Sub-IDs by value, not by click volume alone
High-volume placements often look attractive early because they produce the most visible activity. The better metric is how much qualified revenue or profit each Sub-ID creates relative to its cost and traffic quality.
That comparison is where scaling decisions become clearer. Keep the Sub-IDs that repeatedly turn into profitable sales, cut the ones that consume spend without downstream value, and use the survivors as the basis for the next offer or creative test.
- Clicks and conversion rate for early signal
- Revenue, profit, and ROI for final budget decisions
- Exports for partner or placement reviews
Frequently asked questions
What is a Sub-ID in affiliate tracking?
It is an additional identifier appended to a tracking link so you can tell which source, placement, creator, or variation generated the click and eventual sale.
Should a Sub-ID replace UTM parameters?
Usually not. UTMs are useful for shared channel classification, while Sub-IDs add the extra detail needed for affiliate or partner optimization.
What should I avoid putting in a Sub-ID?
Do not place sensitive information such as personal identifiers, tokens, or credentials in the URL. Use opaque or team-defined labels instead.
Make campaign decisions with clearer data
Tracly brings attribution, traffic quality, testing, and performance signals into one practical workflow.
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