Q4 · Shopify brands
The Q4 Ecommerce Checklist
What to build in September, what to finish in October, and what to leave alone in November.
Black Friday is 27 November, Cyber Monday is 30 November 2026.
11 years · 300+ brands · Shopify Plus Partner · Klaviyo Master Platinum
The build window
September
This is the only window where you can still start something that takes real work. Everything here should be finished, not started, by the end of the month.
Email and SMS
Build your BFCM segments now, while there is time to check them. The four that carry most of the season: VIP for early access, last year's BFCM buyers, frequent buyers, and a re-engagement segment of people who bought once and went quiet.
Rewrite the core automated flows for the season. Welcome, abandoned cart, browse abandonment and post-purchase were almost certainly written for a normal month. In November they carry several times the volume. This is the single most overlooked job on the list, and it is where we most often find money sitting untouched.
Set up SMS properly if you do not have it, including the flows, not just the campaign sends.
Design the holiday popup and the campaign template once, so October is not spent building each send from scratch.
Merchandising
Bundles, kits and gift sets. These need product setup, photography and inventory decisions, which is why they belong in September and not October.
Product page and post-purchase upsells.
Volume discounts, the buy more save more mechanic.
Cart progress bars, if free shipping thresholds are part of your offer.
Site
Holiday collection pages and landing pages, built for paid traffic rather than for browsing. If you are going to spend money sending people somewhere in November, that page should exist in September and be tested.
A gift guide page, added to the navigation.
Gift wrap functionality, if you sell anything giftable and do not offer it.
An announcement bar with scheduling, so promotions can be switched on without a developer.
Checkout and mobile product pages, tested on an actual phone at the traffic levels you are planning to buy. Not reviewed in a report. Tested.
The finish window
October
Nothing new starts in October. This month is for finishing, loading and testing.
Lock the promo calendar. Dates, offers, and who builds what. Written down, not agreed in a meeting. Campaigns built the night before they go out are how brands lose the season.
Load and schedule every campaign that can be scheduled in advance.
Warm up your sending. If you are about to increase email volume sharply, ramping it gradually protects your deliverability. Arriving at the busiest week of the year with a cold list and a sudden volume spike is a bad combination.
Clean the list. Suppress the genuinely dead addresses before you start sending heavily, not after.
Shift paid budget onto what is already converting. November and December are the most expensive advertising weeks of the year, which makes them the worst possible time to test something new.
Check inventory against the campaigns. There is no worse outcome than a successful campaign for a product you run out of on day two.
Set your freeze date, and tell everyone. Pick a date after which nothing structural goes live: no theme changes, no app installs, no checkout edits, no navigation changes. Mid October is defensible, 1 November is the latest we would recommend. After that date the site is frozen and the effort moves to email, SMS and paid.
The execution window
November
By now the work is done and the job is different. This month is about watching, and resisting the urge to change things.
Watch inventory and pause campaigns for products that are running out.
Watch deliverability daily rather than weekly. Placement problems in November cost real money.
Have a plan for the sends that underperform. Not a redesign, just a decision about whether to resend to non-openers and when.
Keep the post-purchase flows working. This is the month you acquire the customers who will buy again in the spring, and the post-purchase email is the only thing making that case.
Leave the site alone. If something is genuinely broken, fix it. Otherwise, leave it.
The honest half
What we would talk you out of, this late
The honest half of the list, and the reason we wrote the page.
Replatforming or migrating. Nobody serious launches a new platform in the six weeks before Black Friday. If an agency offers to migrate you now and have it live for BFCM, that tells you something about the agency. The right window is January and February, and it gets decided in October, not in January. See our Shopify migration playbook.
A full site redesign. Same reasoning. A new landing page or collection page, yes. A new site, no.
Changing your checkout in November. The highest risk change with the least time to recover from it.
Migrating your email platform. Deliverability takes time to re-establish on a new sending setup. Doing it going into your heaviest sending month is the worst available timing.
Launching a loyalty or subscription programme from scratch. These need testing and customer communication. Rushed, they generate support tickets in your busiest week.
Your first test of a new paid channel. The most expensive weeks of the year are for scaling what works, not for finding out what does.
The short version
If you only do three things
Rewrite the core automated flows
Welcome, cart, browse abandonment, post-purchase. They are already receiving traffic and they will receive far more.
Lock the promo calendar in writing
With dates and owners, before the end of September.
Set a freeze date and hold it
After it, nothing structural goes live.
That is most of the value on this page, and all three are achievable in September.
One-page PDF
Get the printable version
The same checklist as a one-page PDF you can print, mark up, or send to your team.
Work with us
If you want a second pair of eyes
We spend 30 minutes with brands going through their Q4 plan. We look at what you have, and we tell you what we would prioritise from this list and what we would leave until January. You keep the plan whether or not you work with us.
Our Q4 build and retainer slots are first-come, first-served, and September is realistically when they get decided. If you want one, tell us and we will be straight with you about what is still doable before BFCM and what is not.
11 years · 300+ brands · Shopify Plus Partner · Klaviyo Master Platinum
FAQ
Common questions
When is BFCM 2026?
Black Friday is Friday 27 November 2026. Cyber Monday is Monday 30 November 2026.
When should Q4 preparation start?
September, for anything that has to be built. October is for finishing, loading and testing what September produced. Brands that start in November are choosing between improvising and doing nothing.
Is it too late to migrate to Shopify before Black Friday?
Yes, if you are asking in September or later. Nobody should be launching a new platform in the six weeks before your biggest sales week. The realistic windows are live before 1 October, which is tight, or January and February with the whole year ahead of it. The second one gets decided in October and November.
What should you not change before BFCM?
Your platform, your checkout, your email sending setup, your site structure, and any paid channel you have never tested. Set a freeze date in mid October and hold it.
What is the most commonly missed item?
The automated email and SMS flows. They keep running, so nobody looks at them, and the versions carrying the busiest four weeks of the year are usually the ones written for a normal month.