What it means
The metric is simple to compute but depends entirely on two definitions: what counts as a complaint and what counts as resolved. Most organisations count a complaint as any formally logged expression of dissatisfaction, and count it resolved when the customer has been given an outcome and the case is closed, not merely when someone has replied.
It matters because unresolved complaints are expensive in ways that never appear on a support budget. Customers with an unresolved issue churn at materially higher rates, escalate to public reviews or regulators, and consume repeated contact handling as they chase the same problem, so each open case keeps costing money until it closes.
In use, the rate is usually reported monthly alongside a time window, such as the share of complaints resolved within five working days. That pairing matters because a 98% resolution rate measured over an unlimited horizon can hide cases that took four months, which is not what the customer experienced.
Regulated sectors such as banking, insurance and utilities often impose the definitions externally, setting statutory deadlines for final responses and requiring firms to report volumes and outcomes. In those settings the resolution rate is not just a management metric but a compliance one, and the reported figure is subject to audit.
The nuance to watch is that the rate is easy to flatter. Closing tickets when a customer stops replying, reclassifying complaints as queries, or splitting one complaint into several tickets all improve the number without improving the experience.
Pairing the rate with a reopen rate and a sample of closed cases keeps it honest.
In practice
Real-world examples.
Example
A retail bank reports that 92% of complaints are resolved within its eight-week regulatory window. When the figure slips to 86% after a system migration, the operations director adds temporary staff rather than risk a regulatory finding.
Example
An online furniture retailer separates delivery damage complaints from billing complaints and finds resolution rates of 97% and 71%. The gap points to a billing system that cannot issue partial refunds without manual approval, which becomes the fix.
Example
A facilities management contractor writes a 95% resolution rate within three working days into its client contracts. Monthly reporting against that figure becomes the main evidence used at contract renewal, where the client had previously relied on impressions.
Think of it
“Resolution rate shows how many complaints you actually solve-successful fixes versus total complaints.
Formula
Calculation
Complaint resolution rate = (Complaints resolved in the period / Complaints received in the period) x 100.
Take a broadband provider that received 2,000 logged complaints during March and closed 1,840 of them as resolved by the end of the month. The resolution rate is (1,840 / 2,000) x 100 = 92%.
That leaves 160 complaints unresolved at month end. If the team's stated target is 95%, it needed to resolve 1,900 cases, so it fell 60 cases short. At an average handling cost of $28 per complaint, the 160 open cases also represent roughly $4,480 of handling work carried into April before any new volume arrives.Case study
Seen in the real world.
Fernwick Utilities is a fictional regional water company used purely as an illustrative example. Its board was pleased to see a complaint resolution rate of 96% reported every month for two years, well above the 90% internal target.
A new customer director looked behind the number and found that roughly one closed case in six was reopened within thirty days, and that agents were closing cases after two unanswered calls to the customer. On a like-for-like basis, counting a reopened case as unresolved, the true rate was closer to 81%.
In this illustrative story, Fernwick changed the definition so a case only closed with a recorded customer confirmation or a documented final response letter. The headline rate fell to 84% in the first month, then climbed to 93% over the next two quarters as the underlying billing problems that caused the repeat contacts were finally fixed.
Watch out
Common mistakes.
- Measuring resolution without a time window, so slow cases and fast cases count identically and the number stops describing the customer experience.
- Counting a case as resolved when the agent has responded rather than when the customer has an outcome, which inflates the rate and hides repeat contacts.
- Reporting a single company-wide rate that averages away a badly performing complaint category, such as billing, inside a strong overall figure.
Questions
People also ask.
Should complaints resolved this month but received last month be included?
Only with a consistent rule, and the cleanest approach is a cohort basis that tracks each month's intake through to closure rather than mixing periods.
What is a reasonable target?
Many service organisations aim for 90% to 95% within their stated window, but the right target depends on the complexity of the complaints and any regulatory deadline that applies.
How does it differ from first contact resolution?
First contact resolution measures the share fixed in a single interaction, while complaint resolution rate measures the share eventually closed within the period, however many contacts that took.
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