The Full Cost of a Fraud Case: A Priced Framework for What One Incident Costs
Fraud Prevention Intelligence · Article 6 of 13 · 11 min read
The Full Cost of a Fraud Case: A Priced Framework for What One Incident Costs
No defensible public figure exists for the full internal cost of handling a fraud case. The number has to be assembled: a few stages carry verified public prices; the rest sit unlabelled in your ledger. This article sets out the complete cascade, with a figure attached wherever one can be defended.
In Brief
- No defensible public figure exists for the full internal cost of a fraud case. A per-incident number must be assembled from a cascade of stages and this article prices every stage that can be priced.
- Two stages carry verified public prices: the Financial Ombudsman case fee of £680, after a £2,000 annual allowance and reimbursement of up to £85,000 per claim shared 50/50, for institutions in scope of the PSR requirement only.
- The Frontier Economics evaluation published on 1 July 2026 prices the policy’s operating burden at industry level: £44m to £56m per year in non-reimbursement costs across fraud prevention, claims handling, dispute management, reporting and compliance.
- Severity, not volume, is the right lens. The 2025 data implies roughly £2,324 lost per APP fraud case on average and roughly £14,873 per investment fraud case, calculations shown in full below.
- Most stages of the cascade never appear against a fraud cost centre, which is why internal MI understates the cost of an incident as well as the exposure behind it (see article 5 ).
- The framework is designed to be completed: readers finish knowing which figures are already publicly priced and which to pull from their own ledger.
The cost line that does not exist
Article 5 closed on a precise claim: the £680 case fee is the floor of the cost, not its measure.1 This article takes that line literally and sets out what the full measure contains.
Ask what one fraud case costs your institution and the honest answer is usually a pause. There is a line for case fees, a line for any reimbursement paid and nothing that captures the rest. The figure is missing not because it is small; the components simply never appear against a fraud cost centre.
Why the number cannot be looked up
No defensible public figure exists for the full internal cost of handling a fraud case at a smaller institution. Research for this series found verified prices for individual stages but no credible source for a universal total. The gap is structural: the costs land in operations, complaints and staff time, where no ledger labels them as fraud.
This article therefore builds a priced framework rather than asserting a total. Every stage of the cascade below is classified as publicly priceable or institution-specific. The framework attaches a source to every verified figure and names the rest as items to pull from your records.
The per-incident cost of fraud is assembled, not looked up.
The cascade: what one incident sets in motion
Seven stages, two kinds of price
A single confirmed incident moves through seven stages: detection, investigation, intervention, customer or member contact, disputed claim handling, Financial Ombudsman escalation and remediation. An eighth stage, reimbursement, applies only where the institution is in scope of the PSR requirement. Each stage consumes either a publicly priced fee or your own staff time and usually both.
Two stages carry public prices and the rest are institution-specific. The disputed claim stage is the most volatile of the unpriced stages. What it costs depends heavily on the evidence available when the claim is challenged (see article 7, forthcoming).
The where-applicable branch: reimbursement inside PSR scope
For institutions in scope of the PSR requirement, a reimbursable claim carries a rule-based price (article 1 owns the mechanics). Liability is shared equally between sending and receiving PSP, up to £85,000 per claim, generally due within five business days.2 Institutions outside scope carry no reimbursement line and article 5 established why the rest of the cascade still applies.
Two features adjust the branch. Sending PSPs may apply an excess of up to £100 and a failed standard of caution can defeat a claim. Neither the excess nor the caution exception can be applied to customers in vulnerable circumstances where that vulnerability had a material impact on their ability to protect themselves.3
Coverage under the cap
Frontier Economics found that more than 99 % of reimbursable APP scam claims fall within the £85,000 cap.3 By value, more than 95 % is covered.
For in-scope institutions the branch is effectively a full-value liability, halved by the split. The PSR has confirmed a consultation on the policy’s parameters launching before the end of 2026.4
The full cost of a fraud case: what is publicly priced
The Financial Ombudsman case fee, 2026/27
From 1 April 2026 the Financial Ombudsman Service charges respondent firms £680 per case after a £2,000 annual allowance.1 The allowance replaced the previous three free cases and absorbs slightly fewer than three chargeable cases at the current fee. Where a professional representative brought the case and the outcome did not change, the fee reduces to £500.1
Fraud drives the caseload: the service recorded 18,900 fraud and scams complaints about current accounts in 2025/26.5 Frontier found most firms receive Ombudsman complaints on around 1 to 2 % of APP scam claims.3 Four firms in its sample ran at 4 to 13 %.3
The allowance illusion
An institution seeing two or three cases a year may perceive escalation as free because the £2,000 allowance absorbs it.1 The next case costs £680 and the year the allowance runs out is the year the volume assumption failed.
What the Frontier evaluation prices at industry level
Frontier Economics published its independent evaluation of the PSR’s APP scam policies on 1 July 2026.3 It is the freshest public pricing of what fraud handling costs the industry. The reimbursement requirement cut in-scope losses by around 21 %, about £73m per year and reimbursement rates rose from 54 to 65 %.3
PSPs incurred “additional non-reimbursement costs from fraud prevention, claims handling, dispute management, reporting and compliance”, estimated at £44m to £56m per year.
Frontier Economics, Independent Evaluation of APP Scam Policies: Summary Report, 1 July 2026
Detection and prevention accounts for £31m to £42m; the remainder covers administration, claims handling, dispute management, reporting and compliance.3 These are industry aggregates and the evaluation publishes no per-case handling figure. That absence is the point: even the best public study of fraud economics leaves the per-incident number to your data.
The Frontier evaluation in brief
Commissioned by the PSR, the evaluation assessed the first year of mandatory reimbursement.3 It found a short-term net benefit of £17m to £29m per year; firms reimbursed 97 % of in-scope claims.34 Out-of-scope fraud grew over the same window.
International APP scam losses rose from £21m in 2023 to £60m in 2025.3 Scams to crypto exchanges grew indicatively from around £59m to £153m over the same period.3 Most stakeholders believe fraudsters are shifting tactics rather than stopping, though Frontier could not quantify how much the policy caused.3
Allowing for displacement and unreported scams, the net benefit narrows to minus £4m to plus £8m.3 The evaluation still judges it likely to be positive.3
What only your ledger can price
The placeholders that complete the framework
Five stages of the cascade carry no public price anywhere. For each, the framework specifies the figure to pull from your own records:
- Fully loaded staff hours per investigated case, across fraud, operations and member-facing teams
- Average handling time and cost for a disputed claim, from challenge to resolution
- Cost per intervention contact, including specialist team time where a case needs direct engagement
- Complaint handling cost per case within the eight-week window, before any Ombudsman referral
- Remediation cost per case: account changes, enhanced monitoring and follow-up communication
- Relationship cost: attrition and balance movement in the twelve months after an incident
Why these costs never reach the fraud cost centre
Article 5 established that internal MI understates member exposure by construction; the same construction governs cost. Case fees and any reimbursement are booked as fraud. Investigation hours, complaint handling and remediation land in operations, staff and service budgets where nothing labels them.
The result is that the incident is underpriced in exactly the reports a board reads. A fraud cost centre showing case fees alone will always look like a rounding error. The conclusion it invites, that fraud is a minor cost, is an artefact of where the costs are booked.
Every stage of the cascade sits downstream of a compromise that happened before any payment moved. Articles 2 and 3 described the detection gap in the pre-session window. The cascade is that gap’s operating cost, paid one incident at a time.
Severity: the answer to low case volumes
Per-case losses, calculated from the 2026 report
UK Finance’s Annual Fraud Report 2026 states £576.4 million in APP fraud losses across 248,070 cases in 2025.6 Losses rose 19 % against case growth of 7 %.6 Dividing the published totals gives roughly £2,324 per case, a calculation, not a stated figure.
The blended average conceals the tail: investment fraud losses reached £221.5 million across 14,893 cases, roughly £14,873 per case.6 That is more than six times the blended average and romance fraud losses rose 23 % to £39.2 million.6 Investment losses grew faster than cases, 40 % against 26, so the average incident is becoming more severe.6
£221.5 million
Investment fraud losses in 2025, up 40 % year-on-year. Source: UK Finance Annual Fraud Report 2026.6
The measurement consequence, extended to cost
The objection this framework meets most often is volume: a handful of cases a year cannot justify the exercise. Severity is the first answer: the categories that empty savings balances run an order of magnitude above the headline average. The measurement consequence is the second: MI understates exposure by construction (see article 5 ) and the same construction hides cost.
Reimbursement returned £354.3 million to victims in 2025, 61 % of losses across the industry.6 That is recovery for the customer, not cost relief for the institution.
Low volume also interacts with the fee structure. The £2,000 allowance hides the first cases,1 and escalation rates of 1 to 2 % make Ombudsman cases episodic.3 A single investment fraud case at the calculated average is a five-figure loss before any internal hour is counted.
Assembling your figure
Completing the framework
The method is short: enter the two public prices where they apply, then fill each bracketed placeholder from your ledger. What results is a per-incident cost you can defend line by line. It also gives the board a number with named sources, which Duty outcomes reporting increasingly asks for (see article 4 ).
A per-incident figure built this way does a second job: it prices what prevention is worth. An incident that never happens saves the whole cascade, not just the case fee.
The cascade is available as a one-page worksheet, formatted for your institution’s own figures, on request from SENGUARD.
The cascade’s most volatile stage is the disputed claim and its cost depends almost entirely on the evidence held. Article 7 examines what good evidence actually looks like.
Key Takeaways
- No universal per-incident fraud cost exists. A defensible figure is assembled from a cascade of stages and this article prices each stage that can be priced.
- The public prices are the £680 Financial Ombudsman case fee, after a £2,000 annual allowance and reimbursement of up to £85,000 per claim shared 50/50, in PSR scope only.
- Frontier Economics prices the industry burden at £44m to £56m per year in non-reimbursement costs and no per-case handling figure is published anywhere.
- Severity beats volume: roughly £2,324 per APP case and £14,873 per investment fraud case, both calculated from UK Finance’s published 2025 totals.
- Most cascade costs never reach a fraud cost centre, so MI underprices the incident; the worksheet method turns that gap into a defensible board figure.
Frequently Asked Questions
What does a Financial Ombudsman case cost a respondent firm in 2026/27?
The case fee is £680 per case from 1 April 2026, after an annual case fee allowance of £2,000. Where a professional representative brought the case and the outcome did not change, the fee reduces to £500.
Does the £85,000 reimbursement cap apply to every UK institution?
No. The cap applies only to claims in scope of the PSR requirement, over Faster Payments and CHAPS. Institutions outside scope carry no mandatory reimbursement line, although the other stages of the cost cascade still apply.
Why do UK Finance and the PSR report different reimbursement rates?
UK Finance reports 61 % of all APP losses reimbursed in 2025, counted by claim-closure date. The PSR reports 97 % of in-scope claims reimbursed, covering only claims eligible under the requirement. Each figure is accurate on its own basis; they simply measure different things.
What is the average loss per APP fraud case in the UK?
UK Finance publishes totals rather than averages: £576.4 million across 248,070 cases in 2025. Dividing those totals gives roughly £2,324 per case and roughly £14,873 for investment fraud, both calculations rather than stated figures.
What did the Frontier Economics evaluation find about the costs of the reimbursement policy?
The evaluation, published on 1 July 2026, estimated additional PSP costs of £44m to £56m per year. Those costs cover fraud prevention, claims handling, dispute management, reporting and compliance. Set against a £73m annual reduction in losses, it found a positive short-term net benefit of £17m to £29m.
Which costs of a fraud case are publicly priced and which are institution-specific?
Two stages carry public prices: the Financial Ombudsman case fee and, in PSR scope, reimbursement under the 50/50 split. Investigation time, customer contact, complaint handling, disputed claim work and remediation are priced only by the institution’s own records.
Can a fraud complaint reach the Financial Ombudsman if the institution is outside PSR reimbursement scope?
Yes. The Financial Ombudsman decides complaints on a fair and reasonable basis regardless of PSR scope. An out-of-scope institution can therefore still face the case fee and the handling cost of escalation (see article 5 ).
Sources
- Financial Ombudsman Service, Plans and Budget 2026/27. financial-ombudsman.org.uk
- Payment Systems Regulator, PS24/7: Faster Payments APP scams reimbursement requirement, confirming the maximum level of reimbursement, 2 October 2024. psr.org.uk
- Frontier Economics, Independent Evaluation of APP Scam Policies: Summary Report, 1 July 2026. frontier-economics.com
- Payment Systems Regulator, Payment fraud falls by £73m following PSR reimbursement scheme, 1 July 2026. psr.org.uk
- Financial Ombudsman Service, Annual complaints data and insight 2025/26, 21 May 2026. financial-ombudsman.org.uk
- UK Finance, Annual Fraud Report 2026, published 12 June 2026 (press release).
About SENGUARD. SENGUARD works with UK retail banking institutions on pre-transaction fraud detection. This series examines the fraud policy and technology landscape facing UK banks: the regulatory frameworks shaping detection obligations, the threat environment evolving around them and the detection architectures being developed in response.