Yes, you can host multiple websites on one server or hosting account, and it’s often cheaper and simpler. The catch is isolation. If every site runs under the same account, one hacked or overloaded site can drag the others down with it. For a couple of small sites that’s a manageable risk; for several busy brands or client sites, a server that keeps each site separate is cleaner.
Key takeaways
- One hosting account can run many sites, but they often share the same files, permissions and resources.
- The biggest risk is cross-site contamination: malware spreading from one site to its neighbours.
- Forgotten sites, like an old campaign or a test copy, are a common way in.
- A VPS with each site under its own user, database and backups gives you control without the shared risk.
Can you host multiple websites on one hosting account?
Usually, yes. Most hosting plans let you add extra domains, each pointing to its own folder. Agencies and owners with several brands do this all the time.
What matters is how the sites are separated behind the scenes. On many shared accounts, every site’s files belong to the same user. To the server, five websites look like one big website.
What are the pros?
- Lower cost. One plan instead of five.
- Less admin. One renewal, one control panel, one support contact.
- Shared resources. A quiet site’s unused capacity is there for a busier one.
What are the pitfalls?
One hack can spread to every site
Sucuri calls this cross-site contamination: a site gets infected by its neighbours because of poor isolation on the server or account (Sucuri). When sites share an owner, malware in one can write to the others. Cleaning one site while its neighbours are still infected rarely works for long.
Forgotten sites become the way in
Every site adds plugins and a theme to keep updated. Patchstack recorded 11,334 new WordPress vulnerabilities in 2025, 91% of them in plugins (Patchstack). In our experience, the site that gets hacked is rarely the main one. It’s the old promotion page or the test copy nobody has logged into for two years.
One busy site slows the rest
A traffic spike or bot attack on one site uses the CPU and memory the others need.
Shared email reputation
If one site is hacked and starts sending spam, the server’s address can land on blocklists. Then legitimate emails from every site on it start bouncing. Our guide to websites sending spam emails explains how that happens.
Tangled handovers
Selling a brand, or handing a client’s site to another agency, is harder when its files, database and email are mixed in with everyone else’s.
What are your options for multiple sites?
| Setup | Isolation | Best for |
|---|---|---|
| Several sites in one shared account | Low: sites can usually reach each other’s files | Two or three small, low-risk sites you update regularly |
| A separate plan for each site | Good | A few important sites, especially for different businesses |
| WordPress Multisite | Low: one install, shared plugins and themes | Closely related sites run by one team |
| A VPS with each site under its own user | Good, with full control | Agencies and owners with several busy sites |
WordPress Multisite is often suggested here, but it suits sites that are separate and similar, like a set of regional blogs. WordPress’s own guide warns that for sites that are strongly interconnected, share data or share users, a network “might not be the best solution” (WordPress.org).
When is a VPS the cleaner choice?
A VPS gives you a fixed share of a server, so your sites don’t compete with strangers. With the right setup, each site runs under its own user, so a break-in on one can’t easily touch another. Sucuri recommends exactly this: separate users and PHP running as each site’s own user (Sucuri).
It makes sense once you run more than a handful of sites, host client sites or have one site that’s busy enough to affect the others. Our guide to VPS hosting in Australia covers the upgrade from shared hosting in more detail. If you’re comparing a VPS with a do-it-yourself cloud server, read our managed VPS Australia comparison first.
How do you host multiple websites safely?
- Give each site its own user. Ask your host how sites are isolated. “Separate folders” isn’t enough on its own.
- Give each site its own database and database user. One leaked password then only opens one site.
- Delete what you don’t use. Old campaign sites, staging copies and abandoned installs should go, after a final backup.
- Update every site, not just the main one. Put all of them on the same update schedule.
- Back up and restore each site separately. You want to roll back one site without touching the others.
How we host multiple sites
Our managed VPS hosting starts at $457 a month + GST, with up to 8 CPU cores, 12 GB of memory and 400 GB of disk, and support 7 days, 8am to 8pm. It runs in NEXTDC data centres in Brisbane and Melbourne. If you’d rather not run the server at all, our managed hosting takes care of it for you. For fewer or smaller sites, compare our hosting plans, or tailor one in the plan builder.
Frequently asked questions
How many websites can I host on one server?
It depends on the server’s CPU and memory and how busy the sites are. A server can run dozens of quiet brochure sites, but only a few busy online shops. Watch resource use, and move any site that regularly dominates the server to its own plan.
If one of my sites is hacked, are the others at risk?
If they share the same account and file owner, yes. Malware can often write to every site the account can reach. Check all of them, not just the one showing symptoms, and clean them together. Isolating sites under separate users reduces the risk.
Is WordPress Multisite a good way to run several business websites?
Usually not for unrelated businesses. Multisite shares one WordPress install, so plugins, themes and updates affect every site. It suits similar sites run by one team. Separate installs are simpler to manage, move and sell.
Is it cheaper to host multiple websites on one plan?
Yes, at first. But one shared problem, such as a hack spreading or a blocklisted email address, can cost more than separate plans would have. Weigh the savings against how important each site is to the business.
Should a small agency host client websites itself?
Only with proper isolation, backups for each site and a clear plan for updates. If that’s more than you want to manage, use a managed VPS or host each client on its own plan.
Sources
- The dangers of lateral movement and website cross contamination, Sucuri, updated January 2024
- State of WordPress Security in 2026, Patchstack
- Before you create a network, WordPress.org