A commitment defining the standard of service a client can expect — response times, availability, turnaround — and what happens if you fall short.
An SLA puts numbers on your promises. Instead of “I’ll be responsive,” it says “I’ll reply within one business day and resolve urgent issues within 24 hours.” It defines the measurable service level a client can count on, and often what they get if you miss it — a credit, priority fix, or fee adjustment. SLAs show up most in ongoing and retainer work.
For sellers, an SLA is a double-edged tool: it justifies premium and retainer pricing by guaranteeing reliability, but only promise what you can actually deliver at scale. A response-time guarantee you break every other week does more damage than no guarantee at all. Set realistic levels with buffer, and cap the remedy so a single miss doesn’t cost you the whole fee.
For buyers, an SLA is worth paying for when uptime or fast response genuinely matters to your business. Read the remedy clause — a guarantee with no consequence for breach is just a nice sentence.
SLAs pair naturally with retainers, build on a defined turnaround time, and should sit alongside a sensible liability cap. If you’re moving clients onto ongoing terms, see retainer clients.