Does your business need a static IP or an SLA?
Static IPs and uptime SLAs are two of the biggest reasons to pay for business internet. Here's who actually needs them — and who's fine without.
You need a static IP if you host anything reachable from outside — a server, VPN, security cameras or a POS that requires it. You want an SLA if downtime directly costs you money. Neither is necessary for a business that just browses, emails and takes card payments over a standard connection.
What a static IP does
A static IP is an address on the internet that never changes, unlike the dynamic IP most connections get. Every device online needs an IP address so data knows where to go; on a residential plan your provider hands you one from a shared pool and swaps it periodically. A static IP is permanently assigned to your line.
That stability is what lets the outside world reliably find something at your location — a server, a camera feed, a VPN endpoint. If the address kept changing, anything trying to connect in would lose track of you every time it rotated.
Static vs. dynamic: the practical difference
For everyday browsing, streaming, and email, a dynamic IP is completely fine — you're reaching out to the internet, not hosting anything that needs to be found. The difference only bites when something needs to connect to you from outside. With a dynamic IP you can paper over that with dynamic-DNS workarounds, but they add fragility and occasional downtime; a static IP just works, and many business services (and some compliance requirements) expect one.
Providers typically offer a static IP as a small monthly add-on on business plans, sometimes as a block of several addresses. Residential plans usually don't offer one at all, which is often the real reason a business ends up on a business tier.
Who actually needs a static IP
You need one if something at your location has to be reachable from the outside. In practice that means:
- →You host a server, website, or application on-site
- →You run a VPN for remote staff to reach the office network
- →You have security cameras or a DVR you view remotely
- →Your POS, alarm, or medical system specifically requires one
- →You use hosted VoIP that recommends a fixed address
- →You need to whitelist your office IP with a vendor or bank
What an SLA gives you
A Service Level Agreement is the provider's contractual promise of reliability — commonly 99.9% uptime — usually backed by bill credits if they miss it and faster, prioritized repair when something breaks. It's less about a document and more about how quickly you're back online when a line goes down.
For a shop that can't take payments while offline, or an office where idle staff cost real money, that guarantee is the whole point of business internet. A residential plan makes no promises: if it's down, you wait in the same queue as everyone else, with no commitment on when it'll be fixed.
How to read an SLA
Not all SLAs are equal — the headline uptime percentage is only part of it. When you compare business plans, look at:
- →Uptime target — 99.9% is about 8.8 hours of downtime a year; 99.99% is under an hour. The extra nines cost more.
- →Mean time to repair — a hard deadline to restore service (often 4 hours) matters more than the uptime number for a small business.
- →Service credits — what you actually get back when they miss, and whether you have to claim it.
- →Support access — a dedicated business line and priority queue, not the general consumer support path.
When you can skip both
If nobody outside needs to reach your network and a few hours offline is merely annoying rather than costly, you can skip the static IP and hard SLA — and a residential plan with a cheap 5G backup line often covers you for far less. A small office that mostly browses, emails, and uses cloud apps doesn't need a fixed address, and an automatic failover connection buys you most of the resilience an SLA promises at a fraction of the price.
The honest test is your worst-case outage. If it's a slow afternoon, save the money. If it's stalled payments, unreachable cameras, or staff who can't work, the static IP and SLA are exactly what you're paying a business plan for.
New to business plans? Start with business vs. residential internet.
- Plan pages and Broadband Facts labels from AT&T Business Fiber, Comcast Business, Verizon Business Internet, Spectrum Business, Frontier Business Fiber, US Mobile for Business, T-Fiber by Metronet Business, gFiber Business, checked Oct 2026
Prices and offers change often; confirm at your address before you order. How we research
Jean founded ShopHighSpeed after trying to find one straight answer about business internet in his own town. He has been a Comcast and Verizon Fios customer, and ranks providers on what they actually deliver, not on what they advertise.
