For most stores, a sensible starting point is to send the first reminder about an hour after the cart is abandoned. If the cart value is high or the product is one people think over, stretch the delay to a few hours or even to the next day, and hold any message that would land late at night until morning. On WhatsApp, start with a single message, and send a second one only when you have something new to say, about a day after the first.
How long to wait depends on when the clock starts, how much thought the purchase takes, what time the cart was left and which other messages the customer gets that day. The decision rules below will help you pick a starting delay for each of your product groups, write down your night-time and second-message rules, choose the tests to run before you switch the flow on and spot the signals that tell you to change the delay.
The cost of sending the first reminder too early or too late
Send too early, and the message may arrive while the customer is still on your site. They may be looking for their card, checking the shipping fee in another tab or waiting for the 3D Secure code on the payment page. A “you forgot your cart” message at that moment does not help them and can make them feel watched. Send too late, and the customer may already have bought what they needed from another store.
While the customer is still on the site, reach them on the site. An exit-intent popup shown to a visitor who is about to leave lets you ask, with a single question, why they did not finish shopping. A WhatsApp reminder only makes sense once the visitor has left.
There is one more reason not to message right away. In its latest quantitative study of abandonment reasons, Baymard Institute found that 42% of US online shoppers have abandoned a cart simply because they were browsing and not ready to buy. Baymard also counts window shopping, price comparison, saving items for later and exploring gift options among abandonments that are largely unavoidable. Messaging the owner of a cart like that within a few minutes will most likely get you nowhere; give them time to decide.
In Pushouse’s WhatsApp cart recovery module, the message goes out when the set waiting period ends; it is not sent to a customer who has placed their order, and it is not repeated for the same cart. We covered what the reminder is and how it is set up in our article on what WhatsApp cart reminders are.
Check when the clock starts
Find out whether your tool counts the waiting period from when the last item was added to the cart or from the customer’s last activity on the site. The two can be more than half an hour apart.
Here is a hypothetical example. A customer adds a dress to the cart at 14:05, then stays on the site until 14:40, checking the size chart, the return policy and the shipping fee. If the clock starts when the item is added, a one-hour setting sends the message at 15:05, only 25 minutes after the customer left. If it starts from the last activity, the same setting sends it at 15:40. If your tool counts from the add-to-cart moment, use a slightly longer delay for categories where shoppers browse for a long time.
If your tool’s documentation does not say, you can find out with a test. Add a product to the cart using your own number, browse the site for about twenty minutes, leave, and note when the message arrives.
Waiting time by product and cart value
The faster the buying decision, the sooner the message should go out. That is why the question of when to send a cart reminder needs a separate answer for each product group; even within one store, the right delay for a towel and for a sofa set is not the same. The delays below are not based on any measurement; use them as a starting point and adjust them with your own data.
For low-priced products bought on impulse, such as cosmetics, accessories, snacks or phone cases, do not wait more than an hour, because the impulse fades quickly. An hour is also a sensible starting point for mid-priced products that involve choosing a size or color, such as clothing, shoes and home textiles; a customer comparing several stores may well have made up their mind by then. For products people buy on a regular basis, such as pet food, coffee, diapers or supplements, the need is already clear and the customer wants to restock before running out. If they have not come back on their own within an hour, remind them; leave it any later and you may lose the order to another store.
High-priced products such as furniture, major appliances, electronics and jewelry are a different story. The decision is talked over at home, measurements are taken and installments are worked out, so a message that arrives within the hour can feel like pressure. For these products, wait 3 to 4 hours or save the reminder for the next day. Remind a cart left in the morning or around midday the same day, and one left in the evening before noon the next day.
If your store sells both low- and high-priced products and your tool lets you set only one waiting period, choose it to suit the group that makes up most of your orders. Take a hypothetical home and living store where three quarters of orders are towels, bed linen and kitchenware at 300 to 600 TL (Turkish lira) and the rest are sofa sets above 20,000 TL. If only one delay can be set, an hour is a sensible start. If your tool lets you build separate flows by cart value, split out the sofa-set carts and message them before noon the next day. If you are not sure which group dominates, start with the longer delay and shorten it based on the results; a message that arrives early can annoy the customer.
Hold carts left at night until morning
A WhatsApp notification does not sit quietly in an inbox the way an email does; on most phones it arrives with a sound or a buzz. The time the message lands matters as much as the waiting period. The reminder for a cart left at 23:40 should not go out at 00:40. Hold any reminder that would land late at night or very early in the morning until a reasonable hour, and check whether your automation tool can restrict sending hours.
Decide for yourself which hours count as night. For most stores, treating 22:00 to 09:00 as quiet hours is a reasonable start. In a store where many carts are left at night, the held reminders may pile up at the same time in the morning; if your message invites a reply, schedule it for a time when your team can answer.
A message held until morning goes out after a longer gap, so write it with that in mind. “The items you just added to your cart” reads oddly nine hours later. Use a sentence with no time reference instead, such as “the items you picked are still in your cart.”
Should you send a second message?
For most carts, one message is enough. If you have set up a multi-message email sequence spread over several days, do not carry it over to WhatsApp unchanged. On WhatsApp, an extra message can lead the customer to block or report you, and the WhatsApp Business Messaging Policy says its systems may limit how many messages a business can send based on that feedback.
A second message also faces a technical obstacle. Meta’s template categorization documentation gives a reminder sent to a user who left items in their cart as an example of a marketing message and notes that such messages count as marketing even if the user requested them. And according to the documentation on per-user marketing message limits, WhatsApp may limit how many marketing messages a user receives from businesses in a given period. In setting that limit, it looks at how many of their recent marketing messages the person has read and how many messages are already in their inbox. Your second message may never reach a customer who rarely reads marketing messages.
If your tool lets you send a second message for the same cart, check three things first:
- Does the first message show as read? If not, do not send a second one.
- Do you have something new to say? You do if stock really is running low, if the promotion ends tonight or if you are answering a question the customer is likely to have. If you would only repeat the same sentence, you do not.
- Is the cart value worth the cost of a second message and the risk of annoying the customer? For low-value carts, it usually is not.
You can roughly work out the answer to the third question. Using hypothetical numbers, say you send the second message to 200 carts and each message costs you 1 TL, so you spend 200 TL. If the average cart is 400 TL and your gross margin is 30%, each recovered order leaves you about 120 TL in profit. For the second message to cover its cost, at least two of those 200 carts have to turn into orders because of that message alone. With an average cart of 150 TL, the same calculation would need five orders.
If the answer to all three is yes, send the second message about 24 hours after the first, again during the day. There is no need for a third message. If you want to write again days later, do not add it to the cart flow; reach past customers who have not bought from you in a long time with a separate win-back flow. That is what the We Miss You module is for.
Recheck stock, price and the link when the wait gets longer
When a reminder goes out the next day, the cart details may be out of date. By morning, the last size of a product in a cart left overnight may have sold, the price may have gone up when a promotion ended in the evening, or the cart link may have expired. If the customer taps the link and finds an empty cart or a higher price, the reminder fails and their trust in the store takes a hit.
If you set the waiting period longer than a few hours, take these precautions:
- If the message will show a price, make sure the price is current at the moment of sending; if you cannot be sure, stick to the product name and the link.
- Find out whether your tool checks stock right before sending. If it does not, keep the delay short for products down to their last sizes or selling out fast during a promotion.
- If your platform does not reserve stock for items in a cart, do not write “we have reserved your items.” The item can sell out when another customer places an order.
- If a next-day message mentions a promotional price, check that the promotion is still running at that hour.
Sample messages for one hour later, the next morning and the next day
The first message only reminds. It gives the link and applies no pressure. A reminder sent an hour later could read:
Hello {{customer name}}, the {{product name}} you added to your {{store name}} cart is still there. If you would like to pick up where you left off: {{cart link}}
In a reminder held until morning, avoid phrases like “just now” that misstate how much time has passed:
Hello {{customer name}}, the {{product name}} you picked is saved in your cart. You can complete your order here whenever it suits you: {{cart link}}
If you are writing to a high-value cart the next day, leave room for the question on the customer’s mind:
Hello {{customer name}}, if you have any questions about measurements, delivery or installment options for the {{product name}}, just reply to this message and our team will get back to you the same day. Your cart: {{cart link}}
If you send a second message, do not repeat the first; give new information. If the promotion ends that evening, you could write:
Hello {{customer name}}, the promotional price on the {{product name}} in your cart ends tonight at 23:59. To complete your order: {{cart link}}
Send messages that ask for a reply only if you can answer replies the same day. In every reminder, include an option that lets the customer opt out with a single tap. If you are thinking of adding a discount code to the second message, first work out how much of your profit the code will take; we go through that decision step by step in our article on whether to offer cart abandoners a discount code.
Account for the other messages sent the same day
Your customer may get other messages from you on the same day. Someone who receives a promotional announcement in the morning follows its link to the site, adds a product to the cart, leaves, and an hour later gets a cart reminder as well. Two sales messages in one day can feel like pressure. On days you send a campaign, consider holding the cart reminder until the next morning for customers who got the announcement that day, or not sending it at all.
Some customers abandon carts several times in the same week. Since each cart counts as a new cart, each one can trigger its own reminder. Check whether your tool has a rule that leaves out customers who received a reminder in the last few days. We cover how many sales messages one customer should get per week in our article on campaign message frequency; count cart reminders toward that total as well.
If your platform also sends an email or SMS reminder for the same cart, do not let both channels send at the same time. Decide which channel sends the first reminder; either switch the other one off or set it to kick in the next day if no order comes in after the first reminder. A cart reminder is only one of the flows within WhatsApp e-commerce automation, so plan them all on the same calendar.
Test the automation and check consent before you switch it on
Even with the right delay, a reminder that goes to the wrong person does harm. Before you switch the flow on, run three tests with your own number. First, add a product to the cart and complete the order before the waiting period ends; no reminder should arrive. Next, place an order with a method where payment comes later, for example bank transfer or cash on delivery; a customer whose order already exists should not get a “you forgot your cart” message. Finally, abandon a cart and tap the link in the message on your phone; the page should open without a problem. For reminders that go out the next day, also check that the link still opens the cart with the items in it.
Next, check consent. The WhatsApp Business Messaging Policy sets two conditions for messaging a customer. They must have given you the number or username you reach them on, and they must have agreed to receive your subsequent messages. In Türkiye, you also need the recipient’s consent before you send commercial electronic messages that promote or market goods and services; the rule is in Article 5 of the Ticari İletişim ve Ticari Elektronik İletiler Hakkında Yönetmelik (the Turkish Regulation on Commercial Communication and Commercial Electronic Messages).
Do not treat a cart reminder as an order notification that needs no consent. Under the regulation, notices about purchases and deliveries do not require prior consent, but they must not promote any goods or services, and the whole point of a cart reminder is to get the purchase completed. We explain this distinction in detail in our article on post-purchase messages. Send the reminder only to customers who have given consent.
Under the same regulation, once an opt-out request reaches you, you must stop sending within three business days. Because a cart flow can send a new message within hours, do not wait that long; remove a customer who wants to opt out before another message goes out.
Fine-tune the delay with your own data
The delays above are a starting point; only your own orders can tell you when a cart reminder should go out in your store. Choose a waiting period and keep it unchanged for at least two weeks. Then change only the delay and compare how many reminders turned into orders in two periods of the same length. If you change the text and the delay at the same time, you will not know which one made the difference. Leave promotion weeks and paydays out of the comparison, because customers may come back on those days even without a message.
Also look at when orders come in. If a large share of customers come back on their own and order before the waiting period ends, do not shorten it; if you do, the message starts going to customers who would have returned anyway. If more and more customers reply “I already ordered,” first check with a test order whether the flow picks up orders, then review the delay.
If opt-out requests or “stop messaging me” replies are rising, look at the delay and the sending time first and change the text later. If you would like to try the reminder in your own store, take a look at the WhatsApp cart recovery module.
