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Tchekz Methodology

How we calculated £1.72 billion.

The headline on our home page isn’t a guess. It’s the upper bound of the consumer-borne cost of UK delivery anomalies for a single calendar year, synthesised from three independent data sources. This page shows the workings, line by line.

Tchekz research • The case for order protection
Updated
June 2026
Scope
UK consumers
Methodology
v1.0
Contents
Layer 01
£85m Direct out-of-pocket loss

Cash leaving consumer bank accounts solely to fix courier errors — fuel and transport to remote depots, return postage on damaged goods, and premium customer-service phone lines. Citizens Advice tracking finds that around 18–20% of UK shoppers hit by a delivery anomaly absorb a direct financial loss, averaging £15.50 per incident. Scaled across the affected UK online shopping population over twelve months, this aggregates to at least £85 million per year. For consumers hit by the worst errors — packages marked “delivered” with a fraudulent photo and subsequently stolen — 40% lose over £20 out of pocket due to failed dispute resolutions.

Source — Citizens Advice press release ↗ (opens in a new tab)
Layer 02
up to £1.72bn Uncompensated “time tax”

The financial value of household hours spent resolving delivery failures — waiting at home for redeliveries, navigating chatbots, travelling to collection points. Citizens Advice and IMRG tracking establish that 37% of UK online shoppers — roughly 15 million people — experience a delivery failure each year, and that resolution takes an average of 5.5 hours per affected household. That is 82.5 million hours of unpaid consumer time annually.

Valuation at UK wage benchmarks
£1.13bn
@ National Living Wage (£11.44/hr)
£1.72bn
@ UK median wage (~£17.40/hr)
Sources — Citizens Advice • IMRG • ONS earnings benchmarks
Layer 03 — context only
£1.6bn Embedded macroeconomic toll

The aggregate logistical cost of first-time delivery failures, lost stock, and dispute administration borne by retailers and carriers, calculated by IMRG and the University of Southampton at £1.6 billion annually. This sits outside the £1.72bn headline. Businesses do not absorb multi-billion losses indefinitely — the cost is structurally passed back to households through retail price inflation and delivery-fee premiums. We exclude it from the headline to avoid double-counting consumer harm we’ve already captured at retail.

Headline arithmetic
£85m direct  +  £1.72bn time tax upper bound  →  up to £1.72bn annual consumer-borne loss.

We round to the time-tax upper bound because the £85m direct cost rounds into the range’s precision. Lower bound at National Living Wage: £1.21 billion.

04 — Per-incident reality

Per-incident reality.

Headline figures roll up from lived consumer experience. Here are the hard per-incident numbers behind them.

MetricValue
Average personal resolution cost£15.50
High-severity threshold (40% of failed disputes)> £20.00
Full order loss benchmark£147.14
First-time failed-attempt cost£11.60
Time-tax value per major dispute£62.92 – £95.70
05 — Wider context

The wider picture.

Consumer-borne losses sit inside a larger ecosystem failure. University of Surrey mapping (2026) puts the total UK last-mile delivery loss — including retailer and carrier costs — at a median £2.3 billion annually, ranging between £317 million and £5.76 billion depending on assumption set. Statistical analysis published in Logistics (Čižiūnieně et al., 2025) further establishes that failures cluster: misdelivery correlates with physical damage at r = 0.938, and transit delays correlate with complete parcel loss at r = 0.918. In plain terms, one delivery failure rarely happens in isolation.

06 — Sources & references

Sources & references.

Citizens Advice — press release on the £85m direct consumer cost of parcel problems. Read the original release ↗
IMRGValuing Home Delivery Review: The true cost of failed last-mile logistics (2022).
ONS — UK National Living Wage and median hourly earnings benchmarks (2024 release).
University of SouthamptonAddressing the last-mile problem: The transport impacts of collection/delivery points.
University of Surrey (2026)Return to sender: Mapping the online economy of refund fraud and last-mile service vulnerabilities.
Čižiūnieně et al. (2025)Analysis of Parcel Delivery Issues, Logistics 9(1), 16.