Customers Reorder Late: How to Time Your Amazon Ads Around Reorder Cycles

Customers don't reorder when the pack runs out. They reorder after it runs out, often weeks after. For any consumable brand on Amazon, that gap is lost sales, and it's the most useful thing to know before you spend a penny on retargeting.

Most brands assume a 30-day pack means a 30-day reorder cycle. When I measured it in Amazon Marketing Cloud across roughly ten consumable brands, that was almost never true. This guide covers what reorder cycles really look like, why the second order matters most, and how to time your ads around them.

People reorder late

On a daily children's supplement sold in 30-day packs, here's how often customers came back:

Non-subscribers were going without the product for more than half the year. They weren't unhappy with it. They just ran out, carried on with life, and got round to reordering later.

On a course-based supplement with a 60-day bottle, repeat buyers came back about 10 days after the bottle ran out, not before.

The lesson is simple: pack size tells you when customers should reorder. Your data tells you when they actually do. Always plan around the second number.

Reorder cycles vary more than you'd think

Here's what the gap between orders looked like across different product types:

Two products in the same account can have completely different rhythms. Set retargeting windows per product, not per account.

The second order is where you win or lose

The first gap is always the longest. After that, customers speed up.

On one trial-heavy daily tablet, the gap from first to second order was about 69 days. By the eighth order and beyond, it had tightened to about 21 days. Once customers reached their third or fourth order, they behaved like a habit.

The catch is getting them there. That same product lost about two-thirds of its customers between the first and second order. Most of the drop-off in any consumable happens right there.

That's why the second order is the most valuable thing your ads can win. On every Seller Central consumable I analysed, a customer who bought a second time was worth 2.8 to 4.5 times as much as a one-time buyer.

When the pack works against you

Sometimes the product itself creates the problem.

One course-based supplement told customers results take 3 to 6 months. But one bottle lasted 30 to 60 days, and about 72% of buyers stopped after one bottle, before the brand's own results window had even started. The fix there wasn't win-back ads. It was getting people to bottle two, through the product page, the directions and the pack size.

Subscribe & Save intervals can drift out of line too. On one powder supplement, about 4 in 5 subscribers stayed on the 30-day default delivery, while actual use pointed to roughly 65 days per pack. The brand can't change Amazon's default, but it can change the pack size, the directions and the product page copy to steer people to the right frequency.

Retargeting windows that match real behaviour

These are the windows I've used, based on measured reorder cycles rather than pack sizes. Days are counted from the customer's last purchase:

Two rules sit behind them:

• Start before they run out. For a 60-day pack, that means around day 40, not day 60.
• Run longer than you'd think. Late reorderers are still worth reaching, and the tail is longer than most brands expect.

For win-back, pitch a reorder, not a subscription. Customers who've reordered by hand two or three times have usually already decided against Subscribe & Save.

The audience size catch

You can build these audiences in AMC, but there's a practical limit: audiences under about 2,000 people often won't serve.

On smaller brands, most of the timed audiences I sized were 4 to 6 times too small. And on one account, seven new audience campaigns spent almost nothing in their first weeks at launch-level bids of around £1.

Before you build anything:

• Size the audience first in AMC.
• If it's too small, use Sponsored Display's built-in purchase remarketing and targeting your own product pages instead. They do a similar job without the minimum size problem.
• If you do launch audience campaigns, check they're actually spending in the first week before judging them.

How to find your own reorder cycle

Without AMC: start from how long the pack lasts and add 30–50%. Then check the Repeat Purchase Behavior report in Brand Analytics to see what share of customers come back at all.

With AMC: run a reorder frequency query to get the average gap between orders, the share of customers who repeat, and orders per repeat customer. If you sell on Subscribe & Save, a delivery interval query shows which frequencies subscribers actually choose.

When you measure the results, judge reorder campaigns on extra repeat orders, new subscribers and cross-purchases, not on first-click ROAS. Many of these customers would have come back eventually. What matters is how many more came back, and how much sooner.

The bottom line

Your reorder cycle is probably longer than your pack size suggests, and the gap between first and second order is where most of your customers disappear. Measure the real cycle, time your ads to start before customers run out, and put your effort into winning that second order.

Want to see what a second order is worth to you? Use the free Amazon LTV calculator to work out your lifetime value and payback month.

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