Two Numbers That Tell If Your Firm Is Dying

Two numbers predict whether a professional service firm survives the next twelve months. Utilization rate and realization rate. Most founders I meet cannot produce either from memory. The ones who can are rarely in trouble.

Utilization rate is billable hours divided by total available hours. Standard denominator is 2,080 annual hours per full-time employee. The target zone sits between 70% and 80%. Above 85% means burnout is compounding — your team is working weekends, skipping documentation, and one departure will crater delivery. Below 60% means you have a bench problem. Unbilled consultants between engagements cost the firm cash every day they sit idle.

Realization rate is dollars collected divided by standard bill rate times hours worked. If you bill a client $250 per hour, work 100 hours, and collect $20,000 instead of $25,000, your realization rate is 80%. The healthy range is 85% to 95%. Every percentage point below 90% on $2 million in revenue is $20,000 in unrecovered write-off. That is cash that walked out the door because you discounted at the proposal stage, failed to invoice for scope creep, or let write-downs become habit.

Here is what most firms miss. Utilization and realization trade against each other. A firm can hit 85% utilization by discounting heavily to win work, dropping realization to 70%. Revenue looks fine on the calendar. Margin is shot. The opposite also happens: a firm holds rate discipline, falls to 55% utilization because proposals aren't converting, and gross revenue collapses. Both metrics must be read together, every month.

Worked example. A 12-person consultancy with seven billable consultants at $200/hour average bill rate. Annual capacity is 7 people times 2,080 hours equals 14,560 available hours. Target utilization at 75% yields 10,920 billable hours. At 90% realization, expected collected revenue is 10,920 hours times $200 times 0.9 equals $1,965,600. If the firm realizes only 80% instead of 90%, collected revenue drops to $1,747,200. That difference of $218,400 is lost to discounting, write-downs, or unapproved comps. The firm must cut a full-time salary or work 13% more hours to recover.

Most firms under 50 people track utilization sporadically and realization not at all. They review pipeline revenue weekly and ignore whether hours worked convert to cash collected. This is like a manufacturer tracking orders booked but not shipments delivered.

David Maister documented this leverage dynamic in Managing the Professional Service Firm. The principle is unchanged thirty years later: profit per partner equals leverage ratio times utilization times realization times bill rate minus cost. Drop any multiplier by 10% and profit per partner drops by 10% unless something else compensates.

Common mistake. Firms calculate utilization using only client-facing hours as the numerator and total salaried hours as the denominator. That is correct. But they exclude paid time off and holidays from available hours, which inflates the rate by 5-8 points. Use 2,080 hours. Subtract PTO and holidays to get a denominator of roughly 1,920 to 1,960 if you want a true capacity view. Be consistent month over month.

Second common mistake. Realization is calculated at engagement close rather than monthly. By the time a six-month engagement wraps, the firm has burned six months of cash flow at the wrong rate. Calculate realization monthly per engagement. Any engagement below 85% realization requires a written action plan from the engagement lead within five business days.

Closing takeaway. Pull both numbers for every billable employee this month. If utilization is below 65% or above 85%, you have a structural problem, not a seasonal one. If realization is below 85%, you are discounting work that you should not have taken or failing to invoice for the work you actually delivered. Fix the metric before you fix anything else.