How to reconcile Amazon Ads against your billing system
This is the check we run first on every account, written out so you can run it without us. It takes about thirty minutes and needs two numbers: what Amazon Ads says it produced, and what your billing system actually shows. The gap between them is the only honest measure of whether your tracking works — and if it comes back small, you do not need us.
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Specific to Amazon Ads × Subscriptions
Amazon Ads vs your subscriptions: only off-Amazon signups reconcile
Only subscriptions sold on your own site can be reconciled, by sending first payments through Amazon's conversion API for off-Amazon destinations and comparing aggregated totals for a closed month. There is no per-record join. Subscribe and Save orders on Amazon never reach your billing system, so leave them out of the comparison entirely.
Amazon is a poor fit for this record type unless you advertise a subscription that is sold on your own site. Subscribe and Save, and memberships bought on Amazon, are billed by Amazon and will never appear in Stripe, Recurly or Paddle. For off-Amazon campaigns there is still no click identifier comparable to gclid on most inventory, so the join between Amazon's report and a subscription row does not exist; this is a totals comparison.
Amazon's windows vary by ad product and by destination, so establish which product drove the traffic before comparing. Amazon Attribution and similar reporting are aggregated and arrive with a delay, which means the most recent days of a month are not settled when you pull them. Use a month that closed some time ago, and compare it against first payments created in billing for the same period.
Expect a loose fit rather than a tight one. A gap in either direction is not by itself a sign of breakage here, because the two figures are produced by different methods. A large Amazon excess usually means on-Amazon purchases are being read alongside off-Amazon signups in the same view.
Amazon Ads × Subscriptions · what breaks
Why Amazon Ads and your billing system disagree
- 01
Every renewal firing as a conversion
The single most common subscription error. A customer who stays two years produces twenty-four payment events, and counting them all inflates the conversion count by exactly your retention rate.
- 02
Trial starts counted as paid conversions
A free trial costs the user nothing. Optimising toward trials reliably finds people who start trials and never pay.
- 03
Cancellations inside the first period never reversed
Early churn on discounted offers is high, and the reversal is almost never wired.
- 04
Lifetime value assumed rather than measured
An industry figure for tenure will either starve a channel that works or overfund one that does not. Your own churn data says something different.
Amazon Ads × Subscriptions · the fix
What you get from this — Amazon Ads × Subscriptions
A number instead of a suspicion
The likely cause, narrowed
A basis for deciding
Amazon Ads × Subscriptions · architecture
What each side is actually counting — Amazon Ads × Subscriptions
- 1
What Amazon Ads counts
For off-Amazon conversions: an event, a timestamp, a value and the click identifier. For on-Amazon conversions: nothing, because the measurement is not yours to do.
- 2
How Amazon Ads attributes it
This is the important thing and most guidance skips it: Amazon Ads spans two very different situations. Sponsored ad formats driving to an Amazon listing produce conversions Amazon measures itself, with no click identifier passed to you and no per-order join available. Amazon DSP driving to your own site is a different case, where a click identifier can reach your landing page and be captured like any other network's.
- 3
The window it uses
Amazon's attribution windows differ by ad product and by whether the conversion happens on Amazon or on your site. Establish which product and which destination you are reporting on before comparing any figure.
- 4
What your billing system counts
First successful payments on new subscriptions, found in Stripe, Chargebee, Recurly, Paddle or whatever charges the card.
- 5
The filter that makes them comparable
New subscriptions only — exclude renewals, and exclude trials that have not yet converted.
Amazon Ads × Subscriptions · events
Reading the gap — Amazon Ads × Subscriptions
| What you see | What it usually means |
|---|---|
| 15%+ platform higher | Usually the wrong event entirely — the platform is counting renewals, trials, or subscriptions that cancelled before the first real charge. |
| 20%+ platform lower | Usually structural — the platform is missing subscriptions it produced — usually a signup-to-payment gap longer than the attribution window. |
Amazon Ads × Subscriptions · diagnose
Diagnostic order — Amazon Ads × Subscriptions
- 01
Confirm both numbers cover the same period and channel
- 02
Every renewal firing as a conversion
The single most common subscription error. A customer who stays two years produces twenty-four payment events, and counting them all inflates the conversion count by exactly your retention rate.
- 03
Trial starts counted as paid conversions
A free trial costs the user nothing. Optimising toward trials reliably finds people who start trials and never pay.
- 04
Cancellations inside the first period never reversed
Early churn on discounted offers is high, and the reversal is almost never wired.
- 05
Read Amazon's own attribution reporting for on-Amazon sales, and your normal reconciliation for off-Amazon conversions
The structural limit is worth stating plainly to anyone selling you on this: for sales that complete inside Amazon, per-order click attribution does not exist and cannot be built. Amazon Attribution gives aggregated, delayed reporting. Anyone offering per-order joins on Amazon-completed sales is describing something that is not available.
Amazon Ads × Subscriptions · prove
How to know you did it right — Amazon Ads × Subscriptions
Source of truth
your billing system — new subscriptions for a fully closed month
Amazon Ads × Subscriptions · free audit
What we check in the free audit
- Confirm both numbers cover the same period and channel
- Every renewal firing as a conversion
- Trial starts counted as paid conversions
- Cancellations inside the first period never reversed
- Read Amazon's own attribution reporting for on-Amazon sales, and your normal reconciliation for off-Amazon conversions
Checked against
your billing system — new subscriptions for a fully closed month
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Amazon Ads × Subscriptions · when not to buy
When the answer is that you do not need us — Amazon Ads × Subscriptions
- If almost all of your new subscriptions come from a channel with no click behind it, no tracking work will reach them — and knowing that is worth more than a build.
- If all your Amazon Ads spend drives to Amazon listings, there is no conversion tracking build here — only a reporting exercise inside Amazon's own tools, and it is worth knowing that before commissioning anything.
Amazon Ads × Subscriptions · what we deliver
The method, step by step — Amazon Ads × Subscriptions
Pull what Amazon Ads reports
Amazon's own attribution reporting for on-amazon sales, and your normal reconciliation for off-amazon conversions.
Pull what your billing system shows
Export subscriptions by creation date for a closed month, filtered to those that took a first successful payment, and record the plan value.
Filter both to the same thing
New subscriptions only — exclude renewals, and exclude trials that have not yet converted.
Compare per record, not on totals
FAQ
Amazon Ads × Subscriptions questions, answered
No. Amazon bills them, so they exist only in Amazon's own reporting. Reconcile them inside Amazon's tools, separately from your own subscriptions.
Check Amazon's current conversion API documentation for what identifiers it accepts. Without a click identifier on your subscriber records, treat the comparison as directional.
Because you should know the size of the problem before anyone quotes you for it. If the gap is small, you have saved yourself a purchase. If it is large, you now know what you are buying rather than taking our word for it.
No. Both numbers come from systems you already own and neither leaves them. There is no tool to sign up for and nothing to upload.
Then compare totals for a closed period and treat the result as directional rather than exact. Amazon's own attribution reporting for on-amazon sales, and your normal reconciliation for off-amazon conversions is still the right place to read the platform's side.
Under five percent is working. Five to fifteen usually means reversals are missing. Above twenty is normally the wrong event being counted, not a broken tag — which is why debugging tags first wastes so much time.
Then fix the filter before drawing any conclusion. New subscriptions only — exclude renewals, and exclude trials that have not yet converted. A mismatch in scope produces a gap that looks like a tracking fault and is not one.
Book the free thirty-minute call and bring both numbers. We will tell you which of the causes above it is, and whether it is something you can fix yourself — which it sometimes is.
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