The E-Commerce trends worth a line in your 2027 plan are the ones that already shipped in 2026: AI assistants that can search and buy from your catalog, payment networks built for those agents, more spend on phones and buy now, pay later, retail media budgets growing faster than ads overall, browser-level privacy opt-outs, and Shopify checkout logic that now runs only on Functions.
Online keeps taking share while that happens. The U.S. Census Bureau's estimate for the second quarter of 2026, released August 18, puts retail E-Commerce at $340.2 billion, up 12.2% from a year earlier and 17.1% of all retail sales.
This list leaves out anything we couldn't tie to a dated 2026 source. Each trend covers what changed, what it means for a brand doing $10M+ online, and what to put on the 2027 plan.
What are the biggest E-Commerce trends for 2027?
Six, each backed by something that shipped or was published in 2026: AI shopping agents with direct catalog access, agent-ready payments, checkout weighted toward mobile and BNPL, retail media growth, opt-out signals built into browsers, and Shopify Plus checkout customization moving fully to Functions. None of them needs a forecast to be real.
- AI assistants become a shopping channel with direct catalog access
- Card networks build payment rails for AI agents
- Mobile and buy now, pay later carry more of checkout
- Retail media keeps outgrowing the ad market
- Privacy opt-outs move into the browser
- Shopify Plus checkout logic runs on Functions only
Trend 1: AI assistants become a shopping channel
AI assistants now read store catalogs directly and, on some surfaces, complete checkout. In 2027, part of your product discovery will happen inside ChatGPT, Gemini, Google AI Mode and Microsoft Copilot, and the assistant will describe your products from whatever data it can read. Clean catalog data is now a channel requirement, not a nice-to-have.
The plumbing arrived in 2026. On January 11, Shopify and Google announced the Universal Commerce Protocol, an open standard for AI agents to connect to merchants and handle checkout, with native shopping in Google AI Mode and the Gemini app and an embedded-checkout update for Copilot. Shopify also announced an Agentic plan that lets brands on any platform list in Shopify Catalog and sell through AI channels without running a Shopify store. In October, Shopify released Shop MCP, which opens the catalog and Shop Pay checkout to any agent developer.
Demand is real but still small. Adobe's 2026 holiday forecast, published September 28, expects AI traffic to U.S. retail sites to rise 130% year over year this season. That is a forecast, and it grows from a modest base.
What to plan for 2027
- Budget catalog cleanup: titles, variant names, specs as structured fields, accurate inventory
- Review your Agentic channel settings per assistant, especially in-chat checkout
- Track AI referral sessions and revenue in GA4 as their own channel
We cover the store-level fixes in Is your store ready for ChatGPT and AI shopping agents?, and DYODE's AEO and GEO optimization work handles crawler access, structured data and answer-first product pages.
Trend 2: payment networks build rails for AI agents
The card networks now sell merchants a way to accept payments that an AI agent starts on a shopper's behalf. For most brands this arrives through your payment processor and platform, not a project you run yourself. The planning question for 2027 is whether your processor, fraud rules and checkout can recognize an agent-initiated order and treat it correctly.
On April 9, 2026, Visa announced Intelligent Commerce Connect, a single integration through the Visa Acceptance Platform that supports agent-initiated payments across several agent protocols, including Trusted Agent Protocol, Agentic Commerce Protocol and Universal Commerce Protocol. Visa says it also helps merchants make product inventory and details accessible so shoppers can discover, select and check out inside an AI platform.
What to plan for 2027
- Ask your payment processor and fraud vendor what they support for agent-initiated orders, and when
- Check that fraud rules don't auto-decline orders because they arrive from an unfamiliar source
- If you are scoping custom agent tools of your own, DYODE's AI agent buildouts start from your real catalog and order data
Trend 3: mobile and buy now, pay later carry more of checkout
More of every season's spend comes through phones, and more of it is split into installments. Adobe forecasts that mobile will account for 57.4% of U.S. online holiday spend in 2026 and that buy now, pay later will drive $21.3 billion in November and December, up 6.6% year over year. Your mobile checkout and payment options are where 2027 revenue is won or lost.
Both numbers come from the same Adobe forecast, which also expects mobile to reach a record 63% of online spend on Thanksgiving Day. These are forecasts for the current season, so compare them against your own December data before you plan around them.
What to plan for 2027
- Run checkout tests on real phones, not desktop browsers resized to look like phones
- Check where BNPL messaging appears: product page, cart and checkout, and whether it matches your actual providers
- Pull post-holiday payment-method mix from your own orders and size BNPL by your numbers, not the national ones
Our 2027 site optimization roadmap covers how to turn holiday data into a ranked fix list.
Trend 4: retail media keeps outgrowing the ad market
Ad money keeps moving to the places where people buy. In September 2026, the IAB raised its 2026 forecast for U.S. commerce media growth to 13.6%, up from the 12.1% it projected in January. If your products sell through Amazon or other retailers, their ad platforms will ask for a bigger share of your 2027 budget.
The IAB's revised forecast also lifted total U.S. ad spending growth for 2026 to more than 12.3%. Retail media buys search and display placements next to the product listing, so it competes for the same budget as your Google and Meta spend.
What to plan for 2027
- Decide on one measure for comparing marketplace ads with your own-site ads, such as new-customer revenue
- Keep marketplace product content in step with your site, since the same shopper sees both
- Plan Amazon advertising and paid search as one budget conversation, not two
Trend 5: privacy opt-outs move into the browser
Starting January 1, 2027, California's Opt Me Out Act requires browser makers to offer a setting that sends an opt-out preference signal to every site a person visits. More shoppers will arrive already opted out of the sale or sharing of their data, and your site has to honor that signal on every page.
The law, AB 566, was signed in October 2025 and takes effect January 1, 2027. State laws keep stacking up too. Venable's 2026 mid-year update lists new comprehensive privacy laws in Louisiana and Oklahoma effective January 1, 2027, Alabama on May 1, 2027, and Vermont on January 1, 2028.
What to plan for 2027
- Confirm your consent platform reads Global Privacy Control and passes the choice to every tag in GTM
- Use Google Consent Mode so analytics follows each visitor's choice instead of dropping them
- Expect less third-party tracking data, and lean on email and SMS data you collect with consent
DYODE did this work for Bentgo, adding Global Privacy Control and CCPA handling through Consentmo, and for Grom, where GA4 runs with Google Consent Mode v2 through its Consentmo banner. For the owned-channel side, see how to revamp your email and SMS program for 2027. Talk to your own counsel about which laws apply to you; this is a planning note, not legal advice.
Trend 6: Shopify Plus checkout logic runs on Functions only
Shopify Scripts stopped running on June 30, 2026, and editing them ended April 15. Any discount, shipping or payment logic a Plus store needs now has to live in Shopify Functions or an app. For 2027, the job is checking that what replaced your Scripts still does everything the old logic did.
Shopify's deprecation notice pointed merchants to a customizations report to see which Scripts could move to Functions or public apps. DYODE moved WYZE's checkout logic to Shopify Functions ahead of the retirement.
What to plan for 2027
- Test every promotion type you plan to run in 2027 against your current Functions and apps before peak, not during it
- List checkout customizations that were dropped in the migration and decide whether to rebuild them
- If you are weighing a bigger architecture change, read Shopify Plus vs headless vs custom first
How should you turn these trends into a 2027 plan?
Sort them by what you control. Catalog data, consent handling and checkout testing are site work you can schedule in Q1. Payment and agent support mostly arrive through your platform and processor, so those are vendor questions. Retail media and BNPL are budget decisions you make with your own holiday data.
A practical order for the first half of 2027:
- Pull your 2026 holiday data: device mix, payment methods, AI referrals, top landing pages
- Fix catalog data and consent handling, since both feed several trends at once
- Retest checkout logic and promotions before any spring sale
- Ask your processor and platform about agent-initiated orders
- Set the retail media and paid search split with real new-customer numbers
If a platform move is part of your 2027, start with planning a 2027 replatform that works back from BFCM, since a move off Magento or Salesforce Commerce Cloud needs most of the year.
Where to start
Run the free DYODE store scan to see your speed, structured data, AI crawler access and accessibility in one pass. For a ranked plan across your stack, analytics and channels, our E-Commerce audits turn findings into a roadmap. DYODE is a Shopify Plus and BigCommerce partner in Fullerton, CA, and if you want a second opinion on your 2027 plan, tell us what you're working with.
About DYODE. Founded in 2016 by former heads of E-Commerce at PacSun and Tilly’s. Shopify Premier Partner.
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