Business Interruption and Quantum Loss

Defensible loss modelling
that withstands challenge.

Key Ledgers reconstructs pre-interruption financial performance and produces defensible quantum reports for insurance claims and civil litigation.

Insurance ClaimsCivil LitigationLoss ReconstructionQuantum Reports

Case Study

Real instruction - name withheld

Business Interruption Claim

Reconstruction of pre-interruption financial performance and defensible loss modelling used to support a six-figure insurance recovery. The report withstood challenge from the insurer's own appointed expert. Key issues included the appropriate base period for performance, the treatment of industry trends and the calculation of the indemnity period.

Six-figure recovery supported

"The report was watertight. Every assumption was documented, every calculation was traceable. The insurer's expert had nothing to challenge."

How We Work

How does Key Ledgers approach a business interruption claim?

Evidence Review

We gather pre-interruption trading records, management accounts, the insurance policy and all relevant documentation. Establishing the correct base period for performance is the foundation of every defensible quantum figure.

Loss Reconstruction

Using the verified base period, we model the revenue and profit the business would have generated but for the interruption, adjusted for industry trends, seasonal patterns and any applicable policy provisions. Every assumption is documented.

Quantum Report

We produce a CPR Part 35 compliant expert report quantifying the insured loss. Every figure is traceable to the underlying evidence, every calculation is auditable, and every assumption is capable of withstanding challenge from the insurer's appointed expert.

150+Expert Witness Instructions

20+Years in Practice

FCCAFellow of ACCA

CPR 35Court-Qualified Expert

Why Key Ledgers

What makes the
critical difference.

Instructing solicitors and Counsel need a forensic accountant who is genuinely independent, forensically precise and experienced enough to withstand cross-examination at trial.

Genuine Independence

Our duty is to the court. No allegiance to insurers, loss adjusters or any party. Our quantum opinion is formed on the evidence alone.

CPR Part 35 Qualified

All expert reports comply with CPR Part 35 and the Practice Direction. We understand the obligations of an expert witness and apply them without compromise.

FCCA and Registered Auditor

Bharat Varsani FCCA is a Fellow of ACCA and a registered auditor, subject to the highest professional and ethical standards.

High Court Experience

Instructed to give oral evidence in High Court proceedings. Experienced in cross-examination by leading Counsel on complex quantum issues.

Forensic Precision

Every figure traceable. Every assumption documented. Every calculation auditable. Reports that withstand challenge from the insurer's own appointed expert.

Same Working Day Response

We respond to all enquiries the same working day. Instruction details are treated as strictly confidential from the first contact.

Who We Work With

Instructed by solicitors, Counsel and policyholders.

Commercial Solicitors

Acting for policyholders in disputed insurance claims and civil quantum disputes.

Insurance Solicitors

Instructed in high-value BI disputes where the insurer's quantum requires independent scrutiny.

Commercial Counsel

Barristers in commercial and insurance litigation requiring expert quantum evidence for trial.

Business Owners

Policyholders and owner-managed businesses with disputed or underpaid BI insurance claims.

What You Receive

Every instruction produces clear, court-ready evidence.

Our output is structured so that solicitors and Counsel can use it immediately, whether for settlement negotiations or trial.

Pre-interruption performance analysis
Base period selection, trend analysis and performance reconstruction with full documentary support.
Loss reconstruction model and quantum calculation
Defensible quantum figure with traceable methodology, adjustments for trends and indemnity period analysis.
CPR Part 35 expert report
A properly structured expert report stating our qualifications, methodology, findings and opinion, compliant with CPR Part 35 and the Practice Direction.
Assumptions schedule
A standalone document cross-referencing every assumption in the quantum to the underlying evidence and policy terms.
Advocates meeting and oral evidence
Attendance at joint expert meetings, production of a joint statement, and oral evidence at trial where required.

Common Questions

Frequently asked questions about business interruption claims.

A business interruption insurance claim is a claim under a business interruption policy for financial losses suffered when a business is unable to trade normally following an insured event. The claim quantifies the difference between the profit the business would have made but for the event and the profit it actually made during the indemnity period.
The indemnity period is defined in the policy and runs from the date of the insured event until the business has returned to the level of trade it would have achieved but for the interruption, or until the policy limit is reached, whichever comes first. The appropriate end date is frequently a point of dispute between the insured and the insurer.
Insurers appoint their own loss adjusters and, in disputed claims, their own forensic accountants. An independent forensic accountant instructed by the policyholder or their solicitors reviews the insurer's figures, identifies errors and produces a defensible counter-analysis. In many cases the difference between the two positions is material.
We are regularly instructed after the insurer has already produced a quantum calculation. We review the insurer's methodology, test their assumptions against the underlying records and identify where their figures cannot be supported by the evidence. Where proceedings are issued, we produce a CPR Part 35 expert report for use at trial.
Yes. Business interruption quantum arises in civil litigation as well as insurance claims, including actions for damages following a breach of contract or tortious act that caused trading losses. We are instructed in both contexts and produce court-ready quantum reports compliant with CPR Part 35.