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Published method

FCR Leakage Diagnostic: formulas, assumptions and a worked example

How the FCR Leakage Diagnostic turns first contact resolution into repeat contacts and their yearly cost, how the root-cause diagnostic caps the improvement you can plan on, and what an improvement realizes and pays back.

Method version 1.0, published 2026-09-25.

What each number is

Repeat contacts and their cost are arithmetic on your inputs and the repeat model you choose. The practical ceilings, the opportunity and capture curves and the opening profile are assumptions, labelled as heuristics. Realizable savings and payback are a conditional forecast: freed capacity becomes cash only through the mechanism you select.

Formulas

Repeat share

One-callback model: (1 − FCR) ÷ (2 − FCR). Geometric model: 1 − FCR. Measured: your repeat share

The same FCR leaks differently depending on how an unresolved issue behaves, so the model is a choice you make and the page names it.

Repeat burden

Contacts × repeat share × marginal cost × repeat multiplier × 12

Marginal cost, never loaded: a removed contact does not shrink the building.

Opportunity

15% + (5 − diagnostic score) ÷ 4 × 65%, held between 15% and 80%

How much of the leakage is controllable. A weak diagnostic means more room.

Capture

25% + (diagnostic score − 1) ÷ 4 × 65%, held between 25% and 90%

How much of that room the operation can take this year. A strong diagnostic means better execution.

Ceiling FCR

Current FCR + (practical maximum for the scope − current FCR) × opportunity × capture

A target above it is capped and the page says so. The practical maximum falls as the scope gets stricter.

Contacts avoided

Contacts × (repeat share now − repeat share at the target)

On a measured base with no measured target, the share scales with (1 − target) ÷ (1 − current).

Realizable

Contacts avoided × repeat cost × 12 × the mechanism's realization share

Outsourced per-contact billing converts at 100%, with no minimum volume commitment assumed.

Payback

Monthly realizable ramps in over 4 months, less recurring cost; payback is the first month cumulative net covers the one-time cost

Searched to 48 months. Recurring cost at or above realizable never pays back.

Rules and bands

Practical maximum FCR by scope · Voice only 93%, cross-channel 90%, digital plus assisted 89%, enterprise 88%

Broader scope means more ways to count as unresolved, so the ceiling falls. Undeclared uses 90% and holds completeness Directional.

Burden range by cost basis · Estimate ±25%, operations data ±15%, finance-confirmed ±10%

The range printed around the burden.

Validity checks · Marginal at or above 85% or at or below 35% of loaded; multiplier above 2.5x; measured share above 60%; internal window under 7 days

Each is disclosed and holds completeness Directional.

Payback and whether the case pays back are properties of the answer and never cap a confidence axis.

Every constant and where it comes from

50,000 contacts per month · Heuristic, no published source

Default so the tool opens on a runnable case. A volume still at this value grades evidence Directional.

72 percent · Heuristic, no published source

Default so the tool opens on a runnable case. An FCR still at this value grades evidence Directional.

6.5 USD per contact · Heuristic, no published source

Default so the tool opens on a runnable case. A marginal cost still at this value grades cost evidence Directional.

11 USD per contact · Heuristic, no published source

Default so the tool opens on a runnable case. Loaded cost is context for the unit metric only. It values no savings and reaches no confidence axis.

7 days · Heuristic, no published source

Default so the tool opens on a runnable case. Callback window for the internal method. It moves a completeness check only.

22 percent of volume · Heuristic, no published source

Default so the tool opens on a runnable case. A measured repeat share still at this value grades evidence Directional.

0 percent of volume · Heuristic, no published source

Default so the tool opens on a runnable case. Zero means model the target share proportionally on the measured base.

1 multiple of a first contact · Heuristic, no published source

Default so the tool opens on a runnable case. The conservative floor. At this value it cannot inflate the burden, so it does not bind evidence.

80 percent · Heuristic, no published source

Default so the tool opens on a runnable case. Target FCR is the user's plan and makes no claim about the operation. It reaches no evidence stream.

150,000 USD one time · Heuristic, no published source

Default so the tool opens on a runnable case. A one-time cost still at this value grades cost evidence Directional.

90,000 USD per year · Heuristic, no published source

Default so the tool opens on a runnable case. A recurring cost still at this value grades cost evidence Directional.

0.93 practical maximum FCR · Heuristic, no published source

Practical ceiling for assisted voice only, the most generous definition.

0.9 practical maximum FCR · Heuristic, no published source

Practical ceiling for contact center cross-channel resolution.

0.89 practical maximum FCR · Heuristic, no published source

Practical ceiling for digital plus assisted, which adds self-service to the resolution set.

0.88 practical maximum FCR · Heuristic, no published source

Practical ceiling for enterprise one-contact, the strictest definition and the substitution fallback.

0.9 practical maximum FCR · Heuristic, no published source

Ceiling applied while no scope is declared. An undeclared definition holds completeness Directional.

0.15 share of repeat burden · Heuristic, no published source

Controllable opportunity at the strongest diagnostic score.

0.65 share of repeat burden · Heuristic, no published source

Opportunity added from the strongest to the weakest diagnostic score.

0.8 share of repeat burden · Heuristic, no published source

Controllable opportunity at the weakest diagnostic score.

0.25 share of opportunity · Heuristic, no published source

Year-one capture at the weakest diagnostic score.

0.65 share of opportunity · Heuristic, no published source

Capture added from the weakest to the strongest diagnostic score.

0.9 share of opportunity · Heuristic, no published source

Year-one capture at the strongest diagnostic score.

0.25 share of burden · Heuristic, no published source

Range printed around the burden when cost inputs are estimates. Display only. It reaches no confidence axis.

0.15 share of burden · Heuristic, no published source

Range printed around the burden when cost inputs are operations data. Display only.

0.1 share of burden · Heuristic, no published source

Range printed around the burden when cost inputs are finance-confirmed by the user's own account. Display only.

4 months · Heuristic, no published source

Linear ramp to steady-state savings. It moves payback and year-one net only.

1.5 multiple of a first contact · Heuristic, no published source

Floor of the aggressive repeat multiplier in the sensitivity rows. Display only.

3 multiple of a first contact · Heuristic, no published source

Ceiling of the aggressive repeat multiplier in the sensitivity rows. Display only.

0.4 multiple of a first contact · Heuristic, no published source

Step above the entered multiplier for the aggressive sensitivity row. Display only.

0.85 share of loaded cost · Threshold

Marginal cost at or above this share of loaded usually means loaded cost was entered as marginal. Disclosed, and holds completeness Directional.

0.35 share of loaded cost · Threshold

Marginal cost at or below this share of loaded is outside the usual 50 to 75 percent range and burden scales with it. Disclosed, and holds completeness Directional.

2.5 multiple of a first contact · Threshold

A repeat multiplier above this sits above the planning range of 1.0x to 2.0x, a threshold set by this platform. Disclosed, and holds completeness Directional until validated.

2 multiple of a first contact · Threshold

A repeat multiplier above this is elevated and noted on the page. Display only. It reaches no confidence axis.

0.6 share of volume · Threshold

A measured repeat share above this is outside the plausible range. Disclosed, and holds completeness Directional.

7 days · Threshold

An internal callback window shorter than this undercounts return contacts and reads FCR high. Disclosed, and holds completeness Directional.

48 months · Threshold

Payback search horizon. Beyond it the page reports beyond 48 months. A property of the answer, so it reaches no confidence axis.

Worked example

Computed by the tool's own engine at its opening inputs, with a declared cross-channel scope, an internal 7-day callback window, every diagnostic statement answered at 3 and avoided hiring as the capacity action (75% of freed capacity). The tool itself opens with no action chosen, which realizes $0. It does not pay back: the example shows a case the tool reports honestly as a loss.

Volume and resolution: 50,000 contacts a month, FCR 72%, target 80%, one-callback model

Cost: $6.50 marginal, $11 loaded per contact, repeat multiplier 1.0

Investment: $150,000 one-time, $90,000 a year recurring

Repeat share

(1 − 0.72) ÷ (2 − 0.72) = 21.88%, 10,938 repeats a month

Repeat burden

10,938 × $6.50 × 12 = $853,125 a year; $405,234 of it controllable at 47.5% opportunity

Ceiling

72% + (90% − 72%) × 47.5% × 57.5% = 76.92%; the 80% target is capped there

Contacts avoided

10,938 − 9,377 = 1,560 a month

Realizable

$121,699 a year gross × 75% = $91,274

Payback

year one $-160,135 after ramp and one-time cost; year two $1,274; payback beyond 48 months

What this tool cannot tell you

  • FCR has no industry standard. A figure measured on a narrower scope or a shorter window reads higher, so the result is comparable only with the definition declared.
  • The repeat model shapes the burden. The page shows the same case under the one-callback and a heavier geometric model so the range is visible.
  • The diagnostic score is your own read of the operation. It sets how much improvement the tool lets you plan on, never whether the case is worth doing.
  • Balancing metrics (reopen, transfer, escalation, handle time, satisfaction) must hold, or an FCR gain is not real.
Open the FCR Leakage Diagnostic
How to cite

The Center of CX, "FCR Leakage Diagnostic method", version 1.0, 25 September 2026, https://www.contactcentercx.com/methodology/fcr-leakage