What is a replenishment reminder?
A replenishment reminder is a triggered campaign message that prompts a customer to reorder something they use up — pet food, coffee, water-filter cartridges, contact lenses, detergent refills — just before they are likely to run out. The timing comes from the customer's own purchase: when the order was delivered, how much they bought and how fast that product is normally used. A good reminder names the exact product and size and makes reordering a single tap.
On WhatsApp it is usually sent as an approved template, because by the time a pack is nearly finished the customer's 24-hour service window closed weeks ago. A nudge to buy again promotes a new purchase, so Meta categorises it as marketing: it is billed at ₹0.94 per delivered message in India, needs the customer's opt-in, and counts towards WhatsApp's per-user marketing limit. Messages about a subscription the customer already set up — "your next scheduled refill ships on Friday; skip or change?" — can qualify as utility, because they concern an existing order.
A replenishment reminder differs from a back-in-stock alert, which notifies customers waiting for an item to return, and from a payment reminder, which chases money owed. Its whole value is in timing: too early and the customer still has plenty, too late and they have already bought elsewhere. That is why effective programmes learn each customer's real reorder interval from purchase history instead of using one fixed cadence for everyone — personalisation of the timing matters more than personalisation of the wording.
Key takeaways
- A replenishment reminder reaches a customer just before a consumable they bought is likely to run out, with a one-tap way to reorder.
- Send date = estimated run-out date minus delivery time and a small buffer; a 30-day pack with three-day delivery is reminded around day 24.
- A nudge to buy again is a marketing template in Meta's categories, billed at ₹0.94 per delivered message in India.
- Notices about a subscription the customer already set up can qualify as utility, because they concern an existing order.
- Check every channel for a reorder just before sending, and learn each customer's real interval instead of one fixed cadence.
Figure 1
Walk one 30-day reorder cycle
Next cycleComing upEvent 7 of 7
Interval learned
She reordered on cue at day 24, which confirms the estimate. Had she reordered unprompted at day 20, the next send date would move to about day 14.
Event 7 of 7: Next cycle — Interval learned (coming up). She reordered on cue at day 24, which confirms the estimate. Had she reordered unprompted at day 20, the next send date would move to about day 14.
Example: A pet-food brand in Pune
A Pune pet-food brand records each delivery's date and bag size. For a customer whose 2 kg bag was delivered on 1 October, its system expects the bag to run out around 31 October and, with three-day delivery, sends a marketing template on 25 October: "Bruno's 2 kg chicken & rice is probably running low — reorder?" with a Reorder button. The customer taps it, receives the product card and pays in the chat; a reorder on cue confirms the estimate, so her next reminder keeps the same timing. Customers who reorder on the website first never receive the WhatsApp nudge, and their shorter, unprompted interval moves their next reminder earlier.
Why it matters
Why does a replenishment reminder matter?
For consumables, the second order is where the profit is — the first one often only covers the cost of acquiring the customer. A reminder that arrives in the few days before the pack runs out catches the moment of need, when the customer is about to search, visit a shop or open a marketplace app. On WhatsApp, where messages are read quickly and a reorder can happen inside the chat, a well-timed reminder can win that repeat purchase for the cost of one marketing message.
How does a replenishment reminder work?
Estimate the run-out date
Combine the delivery date with pack size and typical usage — a 2 kg bag at about 65 g a day lasts roughly 30 days — then replace the estimate with the customer's own median reorder gap once they have two or three orders.
Work back to the send date
Subtract your delivery time plus a buffer: with three-day delivery and a three-day buffer, a 30-day product is reminded on about day 24. Pick a send hour when that customer usually reads messages.
Use an approved marketing template
Name the product and size, add a Reorder quick reply or a URL button with a pre-filled cart link, or use an SPM template that shows the item from your catalogue as a single-product message. Send only to customers who opted in.
Make the reorder one tap
A tap on Reorder opens a service window: reply with the product card or a payment link for the same quantity, and keep the address and payment details from the last order.
Suppress and learn
Before every send, check whether the customer already reordered through any channel — site, app, store or marketplace. Stop after one follow-up, and feed unprompted reorder dates back into the estimate; a reorder straight after a reminder only tells you it was not too late.
Common mistakes with a replenishment reminder
Reminding someone who already reordered
Nothing annoys a customer faster than "time to reorder?" the day after they did. Check orders from every channel just before the send, not when the reminder was scheduled.
One cadence for everyone
Households with two dogs and households with one finish a bag at different speeds. Start from the pack-size estimate, then switch to each customer's own interval as soon as you have it.
Calling it utility
A message that asks for a new purchase is marketing, whatever the template says. Meta re-checks categories and moves misfiled templates to marketing, so budget for ₹0.94 from the start.
Nagging after silence
Repeated reminders to people who do not respond invite blocks and reports that hurt your quality rating, and WhatsApp's per-user marketing limits may hold them back anyway (error 131049). Send one follow-up at most, then wait for the next cycle.
Reminding one-off purchases
Gifts, trial packs and single purchases of durable goods have no natural cycle. Only enrol products that are genuinely consumed, and let the customer opt out of reminders for one item without leaving everything.
Replenishment Reminder FAQs
- Is a replenishment reminder a utility or a marketing message?
- Usually marketing, because it encourages a new purchase. Messages about an order or subscription the customer already has — a scheduled refill shipping soon — can be utility. Meta makes the final call when it reviews the template.
- How early should the reminder go out?
- Early enough for the reorder to arrive before the customer runs out: your delivery time plus a small buffer before the estimated run-out date, typically a few days.
- Can I send it as a free-form message instead of a template?
- Only if the customer has messaged you in the last 24 hours, which is rare weeks after a purchase. In practice it is a template; once the customer taps Reorder, the follow-up can be a free-form reply inside the new window.
- How many reminders should one cycle get?
- One, plus at most one follow-up a few days later if there was no reorder from any channel. Then wait for the next cycle rather than repeating.
Best practices for a replenishment reminder
- Put the product name and size in the first line — the customer should recognise the item from the notification alone.
- Offer "Remind me later" as a quick reply: it gives you the true interval without losing the customer.
- Measure reorder rate within seven days of the reminder against a holdout group that receives nothing.
- For subscriptions, send a utility notice before each scheduled shipment so customers can skip instead of cancelling.
- Use RFM segmentation to decide who gets a reminder at all: lapsed one-time buyers usually need a win-back offer, not a refill nudge.
* Per-message rates for India, ex-GST: marketing, utility and authentication effective 1 July 2026; service messages ₹0.145 since 1 October 2026 (they were ₹0 until 30 September 2026). Volume commitments earn discounts — final rate is confirmed on your account; applicable GST extra. Rates for other countries differ (see the international rate table on /pricing).