We upgrade OpenCart 3 stores to 4.x, but first we tell you honestly whether the jump is worth it. Half the time, staying on 3.0.4.0 is the smarter call.
Base scope of work — applies to all tiers. See the tier comparison below for hours and SLA specifics.
We stand up OpenCart 4 on a staging copy and move your data across, so your live store keeps taking orders while we work.
Every extension you depend on gets a 4-compatible version, a replacement, or a custom rebuild. You get the list before we start.
Your storefront rebuilt on 4's structure so it matches the store your customers already know.
Every old product and category URL mapped to its new address so search rankings survive the move.
A real end-to-end test order on staging before launch, then the switch during a quiet hour with OpenCart 3 kept as a fallback.
Transparent process — you always know what stage we're at and what comes next.
We look at your version, extensions, custom code, and data, then tell you whether to upgrade at all and quote the real job. You keep the findings either way.
OpenCart 4 goes up on a staging copy with your data, extensions sorted, and the theme rebuilt.
We map URLs, set 301s, and run a full test order until checkout, email, and payment all pass.
We switch during a quiet hour and keep OpenCart 3 on standby for a week.
Scope transparency — no surprises in the monthly report.
Access we require — passed via secure channel (1Password / Bitwarden).
Not always. If your 3.0.4 store sells fine and your host still supports PHP 7 safely, staying put is often the cheaper choice. The strongest reason to move is PHP: OpenCart 4 needs PHP 8.1, and PHP 7 is past end of life. We tell you honestly which side you are on before you spend anything.
Most upgrades run from about $700 for a small store with few extensions up to around $3,000 when there are many extensions to port and a full theme rebuild. We quote a fixed price after the initial check, not a guess.
Some will, many will not. OCMOD changed in 4 and plenty of 3.x extensions were never ported. We check each one and give you a 4-compatible version, a replacement, or a custom rebuild. This is usually the largest part of the work.
Not if the URLs are handled properly. OpenCart 4 builds SEO URLs differently, so we map every existing product and category address and set 301 redirects. Google keeps the pages it already indexed.
No. We build OpenCart 4 on a staging copy while your live store keeps selling on 3. The only downtime is the short switch at go-live, which we schedule for a quiet hour.
We keep your OpenCart 3 store live as a fallback for a week and fix any migration problem at no charge for 30 days.
Often, no. If your OpenCart 3.0.4 store takes payments and sells fine, version 4 gives you very little a shopper would notice. The OpenCart community forum still tells people to stay on 3.0.4.0 for anything running real orders, and they are not wrong to be cautious. We say the same thing to clients when it fits: keep 3, patch it, and spend the budget somewhere it shows.
Where the upgrade earns its cost is PHP. OpenCart 3 runs on PHP 7.x, which is past end of life and getting harder to host safely. OpenCart 4 needs PHP 8.1 or newer. If your host is pushing you off PHP 7, that deadline, not the feature list, is the real reason to move.
OpenCart 4 changed enough under the hood that a click-to-upgrade almost never survives contact with a real store. Three things break, in order.
Extensions. OCMOD works differently in 4, and a lot of 3.x extensions were never ported. We check every extension you rely on and find a 4-compatible version, a replacement, or rebuild the piece as custom code. This is usually the biggest slice of the job.
The theme. A 3.x theme does not run on 4. We rebuild your storefront on OpenCart 4’s structure so it looks like the store your customers already know, not the default template.
URLs and SEO. OpenCart 4 handles SEO URLs differently. Get this wrong and you lose rankings you already paid for. We map every existing product and category URL and set 301 redirects so Google keeps the pages it indexed. If you are weighing a full platform move instead, our OpenCart migration service covers that path.
We build the OpenCart 4 store on a staging copy, never on your live shop. You keep selling on 3 the whole time. When staging passes a real test order, we schedule the switch for a quiet hour and keep the old store on standby for a week in case anything surfaces.
If something we migrated is missing or broken after launch, we fix it at no charge. Your OpenCart 3 store stays live as a fallback for a week, so there is always a way back.
