Response time is how long it takes your team to acknowledge a request after a customer submits it. Resolution time is how long it takes to actually fix the problem and close the ticket. Response covers the first reply; resolution covers everything from diagnosis through the fix to final confirmation. A fast response is not the same as a fast fix, which is exactly why service level agreements track them as two separate promises.
Last updated: July 2026.
Support teams that measure only one of these end up with a blind spot. Track response alone and you can hit every target while customers wait days for a real answer. Track resolution alone and slow first replies leave people wondering if anyone even saw their message. An SLA sets both because they protect different parts of the experience: response protects the feeling of being heard, resolution protects the outcome. Understanding the gap between them is the whole point.
What is the difference between response time and resolution time?
Response time is the clock from when a customer submits a request to when your team acknowledges it and begins working. The acknowledgment can be a human reply, an assignment, or a status update, but it has to be a real touch, not an automated "we got your email" receipt. It answers one question for the customer: did a person see this?
Resolution time is the clock from when the request is created to when it is fully resolved and closed. It includes diagnosis, troubleshooting, applying the fix, verifying with the customer, and any follow-up needed to be sure the problem is genuinely gone. It answers the harder question: is my problem actually solved? Because resolution wraps up all of that work, it is almost always longer than response, sometimes by a wide margin.
Response time vs resolution time: side by side
| Dimension | Response time | Resolution time |
|---|---|---|
| What it measures | Time until the request is acknowledged | Time until the problem is fixed and closed |
| Clock starts | When the customer submits the request | When the ticket is created |
| Clock stops | At the first meaningful human reply | When the issue is resolved and verified |
| Typical length | Minutes to a few hours | Hours to several business days |
| What it protects | The feeling of being heard | The actual outcome |
| Mostly driven by | Staffing and triage speed | Problem complexity and process |
A worked example: fast response, slow resolution
A customer reports at 9:00 a.m. that their data export is failing. An agent replies at 9:08 a.m. to say they are looking into it. Response time: 8 minutes, well inside a one-hour target. But the fix requires a config change that engineering ships the next morning, and the customer confirms it works at 10:30 a.m. the following day. Resolution time: roughly 25 hours. Both numbers are true, and both matter. The 8-minute response kept the customer from feeling ignored; the 25-hour resolution is the number to attack if fixes are consistently slow. Reporting only the response time here would hide the real problem.
Typical SLA targets by priority
Targets scale with severity. The higher the impact, the tighter both clocks. These are common industry ranges, not a standard every company follows; set yours against your own product and staffing.
| Priority | Example impact | Response target | Resolution target |
|---|---|---|---|
| P1 (critical) | System down, many users blocked | 15 to 30 minutes | 4 to 8 hours |
| P2 (high) | Major feature broken, no workaround | 1 hour | Same day, 8 to 16 business hours |
| P3 (medium) | Minor feature issue with a workaround | 4 hours | 1 to 3 business days |
| P4 (low) | Question or cosmetic issue | 1 business day | 2 to 5 business days |
Which matters more, response time or resolution time?
They matter for different reasons, so the honest answer is both, measured together. Response time is the trust signal: a quick acknowledgment tells the customer they are not shouting into a void, and it is the number most tied to satisfaction on the first touch. Resolution time is the outcome signal: it decides whether the problem actually goes away. Optimize only for response and you get a team that replies instantly and resolves nothing; optimize only for resolution and customers stew in silence while you work. The two pages that go deeper on each metric are worth reading side by side: first response time for the acknowledgment clock and average resolution time for the fix clock.
How response and resolution fit into an SLA
Most service level agreements name both as separate commitments, tied to priority levels, so a P1 outage carries a tighter promise than a P4 question. Writing them well means being precise about when each clock starts and stops, and about what pauses them (waiting on the customer usually pauses the resolution clock, for example). Vague definitions are where SLA disputes come from. If you are drafting or renegotiating these, the mechanics of good targets sit in our guide to customer service SLAs, and the way response and resolution relate to service objectives and indicators is covered in SLA vs SLO vs SLI.
Frequently asked questions about response time and resolution time
What is the difference between response time and resolution time? Response time is how long until your team acknowledges a request after the customer submits it. Resolution time is how long until the problem is fully fixed and the ticket is closed. Response covers the first meaningful reply; resolution covers diagnosis, the fix, and verification, so it is almost always longer.
What is SLA response time? SLA response time is the maximum time your team commits to acknowledge a customer request under a service level agreement. The clock starts when the request is submitted and stops at the first real human reply or assignment, not an automated receipt. Targets are usually tied to priority, from minutes for critical issues to a business day for low-priority questions.
What is resolution time in an SLA? Resolution time in an SLA is the committed time to fully resolve and close a request, measured from ticket creation to a verified fix. It includes diagnosis, troubleshooting, applying the solution, and confirming with the customer. Because it wraps up all the work needed to solve the problem, resolution targets are longer than response targets and scale with the issue's severity.
Is response time part of resolution time? Yes, in the sense that both clocks usually start from the same moment the ticket is created, and the response happens inside the resolution window. A ticket is acknowledged (response) and then, sometime later, resolved (resolution). The response is the first milestone on the way to resolution, which is why a fast response never guarantees a fast fix.
Track both clocks, define exactly when each starts and stops, and read them together. A team that acknowledges fast and resolves slowly has a process problem to fix, not a metric to hide. Both numbers are part of the wider set of customer service metrics that tell you whether your support operation is actually working for the people who depend on it.