Costs Management in £100m+ Claims: Why Law Firms Instruct Leading Costs Lawyers Early

In high-value commercial litigation, costs are never a side issue. In claims exceeding £100 million, they are a central strategic consideration from the outset. For litigation partners handling complex disputes in the High Court or Commercial Court, the question is not whether to involve leading costs lawyers/costs draftsman, but when. At Knapp Richardson, we are…

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At Knapp Richardson, we are frequently instructed at the earliest stages of substantial claims. Our experience shows that early involvement in costs management can materially influence litigation strategy, budgeting accuracy, funding decisions and ultimately recovery.

Below we explore why costs lawyers play such a critical role in large-scale litigation and how early instruction benefits legal teams.

The Scale and Complexity of £100m+ Litigation

Claims of this size often involve:

Multi-party proceedings
International elements
Extensive disclosure exercises
Competing expert disciplines
Lengthy trials in the Commercial Court or Chancery Division

The procedural framework under CPR Part 3 and costs management rules applies with full force. In many substantial claims, costs budgets can themselves run into tens of millions of pounds. Errors or oversights at this stage can have long-term consequences.

Costs management in large claims is not simply an administrative exercise. It requires detailed forecasting, procedural awareness and a practical understanding of how judges approach proportionality and reasonableness in complex disputes.

This is where experienced costs lawyers can and do add immeasurable value.

Early Viability and Costs Exposure Analysis

Before proceedings are even issued, litigation teams must evaluate risk. That risk includes adverse exposure to costs, recoverability, and funding viability.

At Knapp Richardson, we work alongside solicitors and counsel to analyse likely spend across each litigation phase. This includes:

Drafting detailed Precedent H budgets
Modelling alternative procedural pathways
Assessing likely recoverability on detailed assessment
Evaluating potential Part 36 consequences
Advising on proportionality in high-value claims

Time spent does not equate to value recovered. Courts remain vigilant in scrutinising whether costs are proportionate to the matters in issue, even in £100m disputes. Early modelling allows legal teams to proceed with clarity rather than assumption.

Precedent H and the Strategic Importance of Budget Accuracy

Costs budgeting in high-value claims is rarely straightforward. Precedent H requires careful allocation across phases such as disclosure, witness evidence, expert reports and trial preparation.

In substantial commercial disputes, disclosure alone may justify a significant proportion of the overall budget. Without detailed experience of similar matters, there is a risk of underestimating the scale of work required or overestimating what the court will allow.

We approach budgeting as both a technical and strategic exercise. That means:

Analysing historic data from comparable high-value cases
Ensuring consistency between assumptions and pleadings
Identifying phases vulnerable to challenge
Preparing for robust discussion at the Case Management Conference

Judges expect clarity. They expect justification. Leading costs lawyers ensure that budgets are defensible under scrutiny and aligned with the litigation strategy.

Managing Proportionality in High-Value Disputes

It is sometimes assumed that proportionality concerns diminish as claim values increase. That is not the case.

CPR 44.3 requires costs to be both reasonable and proportionate. Even in nine-figure disputes, the court will examine whether expenditure was justified by the issues at stake.

In practice, this means careful management of:

Duplication of fee earners
Seniority of time recorded
Scope of expert involvement
Trial preparation resources
Ongoing disclosure costs

At Knapp Richardson, we assist litigation teams in maintaining discipline throughout proceedings. Costs management is not a single event at the CMC. It is an ongoing process. Monitoring budgeted phases against actual expenditure reduces the risk of adverse findings at detailed assessment.

Variations in Budget and Procedural Developments

Large commercial claims rarely proceed exactly as anticipated. Amendments to pleadings, additional expert evidence, jurisdictional challenges or expanded disclosure can significantly alter the cost landscape.

Where developments justify budget revisions, formal variation applications may be required. Timing and justification are critical.

Leading costs lawyers play a key role in:

Identifying when a significant development has occurred
Quantifying the financial impact
Preparing variation applications
Protecting recoverability

Failure to address budget changes promptly can result in irrecoverable expenditure. Early and continued involvement mitigates that risk.

Detailed Assessment in High-Value Claims

Even with careful budgeting, substantial disputes often proceed to detailed assessment before the Senior Courts Costs Office.

In £100m+ claims, bills of costs can be extensive and highly technical. Points of Dispute need to be detailed and commercially robust. Negotiations may involve large sums and complex arguments on proportionality, conduct and phase allocation.

We prepare electronic bills supported by structured data analysis. Our approach is methodical and evidence-based. By aligning time entries, phase narratives and procedural milestones, we strengthen your position well before any assessment hearing.

Why Seeking Advice Early Matters

The earlier costs specialists are involved, the greater the strategic advantage. Early instruction allows for:

Realistic forecasting
Informed funding decisions
Stronger budgets at the CMC
Ongoing expenditure control
Improved recoverability on assessment

At Knapp Richardson, we have acted in numerous large, complex disputes before the High Court and in arbitration. Our experience across multi-million-pound and class action matters has shown that proactive costs management is essential.