Black Friday 2026 flash sale checklist: offer, site, team and follow-up
Black Friday 2026 is Friday, November 27, the day after US Thanksgiving, and Cyber Monday is November 30. The emails are the part of the weekend everyone plans. This checklist is for the rest: an offer your margin can pay for, a site and checkout that hold up, a support team with answers ready, and the week after the sale.
For the email side, including the send calendar, subject lines and which timer goes in each email, see our Black Friday countdown timer playbook.
Four weeks out: decide the offer
Pick one headline offer
Shoppers compare dozens of offers in a morning. One clear line, such as "30% off everything" or "second item half price", is easier to remember than a table of tiers. Decide it now, so every email, banner and ad says the same thing.
Work out what the discount costs you
A discount comes out of your margin, not your revenue. To earn the same gross profit at a lower price, you have to sell more units. On a product with a 50% gross margin:
| Discount | Margin left per sale | Extra units needed to break even |
|---|---|---|
| 10% | 40% | 25% more |
| 20% | 30% | 67% more |
| 30% | 20% | 150% more |
| 40% | 10% | 400% more |
The formula is discount ÷ (margin − discount). Run it with your own margins before you choose the number. A deep discount on a low-margin product can sell out and still lose money.
Choose the products with that in mind
Bestsellers bring people in. Overstock and last season's lines are where a deep discount costs you least. Be careful with anything you can't restock before Christmas: selling it out on Friday leaves nothing for December's full-price shoppers.
Consider value instead of depth
Free shipping, a gift with purchase or a bundle can feel as generous as a bigger percentage and cost you less. A spend threshold ("$20 off orders over $100") raises the average order instead of lowering it.
Check the rules on "was" prices
In the EU, a price reduction must be shown against the lowest price you charged in the previous 30 days. Raising prices in early November to make the Black Friday discount look bigger is exactly what that rule is there to stop. Other countries have their own reference-price rules, so check where you sell.
Two to three weeks out: get the site ready
- Build the sale page now. A collection that holds only the sale products, with the offer and the end date at the top. Leave it unpublished until launch, and check it on a phone, since that's where most of your email traffic will read it.
- Schedule the discounts in your store. Give each one its start and end date, so nothing depends on someone switching it on at midnight. With Shopify or WooCommerce connected to flashtimer (Pro and up), each discount with an end date also gets its own timer, and changing the date in your store updates every email already sent.
- Ask what your platform can take. Hosted platforms such as Shopify scale for you; a self-hosted WooCommerce store may need caching or a bigger plan from your host. Remove the slow apps and scripts you don't need from the sale and product pages.
- Talk to your payment provider. A sudden jump in order volume can trigger fraud checks or payout reviews. If you expect far more orders than usual, tell them before Friday.
- Decide what happens when something sells out. Hide it, show it as sold out, or point to an alternative. On Business, a flashtimer timer for a Shopify, PrestaShop, Magento or Squarespace product can end when its stock runs out, so your emails stop counting down to something you no longer have.
One week out: brief the team
- Write a one-page sale sheet. The offer, the start and end times with their time zone, what's excluded, the code if there is one, the returns policy for sale items and your Christmas shipping cut-offs. Everyone who answers a customer works from the same page.
- Prepare saved replies for the questions you will get: "my code doesn't work", "can I get the sale price on last week's order", "when will it arrive" and "can I return a sale item".
- Decide the price-adjustment policy now, not on Saturday when the first customer who bought last week asks.
- Make a rota. Who watches the site, orders, the inbox and social over the weekend, and who is allowed to pause an email or fix a broken discount.
The week before: test everything end to end
- Place a real order with the discount, on a phone, then refund it. It's the only test that covers the product page, the cart, the code, the payment and the confirmation email at once.
- Send yourself every email and open it in Gmail, Apple Mail and classic Outlook. Check that the timer and the deadline written in the text agree, and that every link lands on the sale page. Our email countdown timer best practices have a pre-send checklist.
- Check your timer views. Every open of every email loads the timer, so a big list getting several emails over the weekend can use hundreds of thousands of views. The playbook shows how to estimate it, and paid plans can top up if a send goes bigger than expected.
- Decide what late openers see. People open Black Friday emails for weeks. Set an expiry message, or on Basic and up a fallback image, so they see your current offer instead of a timer stuck at zero.
During the sale
- Watch the basics: the site, the discount applying at checkout, stock levels and the support inbox.
- Keep the deadline. Extending a sale that "ends tonight" teaches your list that your deadlines don't mean anything, and next year they'll wait. If something genuinely goes wrong, such as an outage, extend it, say so plainly, and change the timer's end date: every email already sent shows the new one.
- Send the last call in the final hours, to subscribers who haven't bought yet.
After Cyber Monday
- End the offer on time, in the store and on the site, and let the timers show their expiry message.
- Don't follow it with another discount straight away. Thank your new customers instead, and move them into your welcome flow. The next email worth a timer is your Christmas shipping deadline.
- Write the debrief within a week, while the numbers are fresh. Our guide to what to measure after a flash sale lists the metrics that matter.
FAQ
When is Black Friday 2026?
Friday, November 27, 2026, the day after US Thanksgiving (Thursday, November 26). Cyber Monday is November 30.
How big should my Black Friday discount be?
There is no standard figure, so work back from your margin. On a product with a 50% margin, 20% off means selling 67% more units to make the same profit, and 30% off means 150% more. Free shipping, gifts and bundles can feel just as generous at a lower cost.
How long should a Black Friday flash sale run?
A true flash sale runs for the day itself, which makes for the strongest deadline. Many stores run one sale from Friday through Cyber Monday instead. Either way, give each deadline its own timer, so no email counts down to the wrong one.
Should I put a countdown timer in Black Friday emails?
Yes, as long as the deadline is real. Use one fixed timer per deadline, write the deadline in the email text as well, and set what readers see after it passes. See how to add a countdown timer to an email for the setup.
Make your Black Friday timers
Browse ready-made Black Friday and Cyber Monday email examples, then make yours in flashtimer: set the deadline, match your brand, and paste it into any email platform. Start free — no card.