Add milestones and change control to every budget

Across many organisations, complex matters are still budgeted without a consistent method. Some firms have strong templates for specific practice areas, but many rely on improvisation: broad phases, rounded numbers, and an explanation of why “every case is different.” That may be true, but it’s not a plan.

On the client side, the challenge is similar. A large share of work sent to external counsel is litigation or multi-jurisdictional work that most law departments aren’t set up to run end-to-end internally. The person managing the file may be an excellent commercial lawyer who doesn’t live in litigation day-to-day. Without a shared budgeting framework, it’s hard to test the assumptions behind the estimate - and even harder to reset course before costs escalate.

For complex work, the most useful “budget” is not a single figure. It’s a matter plan that translates into hours and fees. At minimum, it breaks the file into phases and tasks, assigns owners, and states what has to be true for each task to happen.

A practical way to structure this is to budget by phases (for example: early case assessment, pleadings, discovery, motions, trial preparation, trial, appeal) and then break each phase into tasks that a team can actually execute. For each task, estimate the hours by role (partner, associate, paralegal) and link the estimate to explicit planning assumptions.

Complex files don’t go off the rails because teams are “wrong” about the future. They go off the rails because nobody agrees on which future the budget is built around. Bring the assumptions into the open early, before a large team is mobilised.

One effective practice is to assign a probability to each task’s assumptions. As a rule of thumb, tasks expected to require around 100 hours or less should be budgeted only when the underlying assumption is highly likely. Bigger work blocks should be broken into smaller parcels, both to reduce rounding and to make re-planning easier when facts change.

This approach forces the right conversation up front: what’s most likely, what’s optional, what’s contingent, and what events would trigger a different path. It also makes it easier for the client to compare competing budgets, because the logic is visible - not just the total.

A detailed budget should do more than list phases. It should show who is doing the work. Provide hours by phase and task for partners, associates, and paralegals, ideally naming the planned team members. This gives the client a way to assess whether the staffing model matches the risk, complexity, and desired cost profile.

In many matters, meaningful savings come from shifting the right work to the right level of the team. Partners should focus on strategy, key advocacy, and the decisions that move the file. Associates and paralegals can handle more of the repeatable execution work - without sacrificing quality - when processes and supervision are clear.

Clients often ask for a “worst-case” number. The problem is that worst-case budgets become self-fulfilling: they discourage early decisions, set the wrong expectations, and make every conversation feel like a negotiation. A better approach is to budget for the most likely scenario and agree on how changes will be handled.

Retainer agreements should include clear milestones to review and revise the matter plan and budget. If assumptions shift materially, or if the budget is expected to exceed a defined threshold (for example, 10 percent), the team should produce an updated budget with the new assumptions and the impact on scope, timing, and staffing.

This aligns better with how businesses plan. Most organisations want to understand legal cost on an annual cycle, but complex matters rarely respect calendar boundaries. Rolling forecasts with milestone-based resets create a bridge between legal uncertainty and financial planning.

Law departments should expect their primary firms to explain how they manage complex work: training, methodology, templates, code sets, and project management support. The point is not bureaucracy. It’s repeatability - a way to plan, track, and adjust without reinventing the wheel every time.

On the client side, consider designating one person (or a small group) to review and approve all complex matter budgets. Concentrating this responsibility builds internal expertise quickly, improves consistency, and makes discussions with external counsel faster and more constructive. Over time, firms appreciate the clarity because it reduces rework, surprises, and uncomfortable “after-the-fact” fee debates.

Complex legal work will always contain uncertainty. The way to control cost is not to argue about time entries after they appear. It is to agree up front on scope, assumptions, staffing, and review points - and to treat the budget as a living plan that evolves as the case evolves.