Capacity planning tools show you who's free next week. They rarely show you whether that person is actually the right one to staff, or what saying yes to a new project does to margin. Here's what to look for.
Hourglass Editorial Team
Hourglass · 11 July 2026
Most capacity planning tools answer one question well: who has hours available next week. That's a genuinely useful question, and dedicated schedulers like Float and Resource Guru answer it cleanly. But it's rarely the only question a professional services firm needs answered when deciding whether to take on a new project, and stopping there leaves real value on the table.
"Who's free" is really shorthand for a more commercially important question: if we take on this new project, who should staff it, what does that do to their utilisation and everyone else's, and does the resulting margin actually make the project worth taking? A capacity view that only shows availability, without connecting to billing rates, project budgets or profitability, answers the scheduling half of that question and leaves the commercial half to guesswork.
This matters because staffing decisions are financial decisions in a professional services firm, whether or not they're treated that way. Assigning your most senior, highest-cost person to a project with a tight, fixed-price budget can turn an apparently healthy-margin engagement into a loss-making one, even though every hour was tracked accurately and every deadline was hit. A capacity tool that shows availability but not cost or margin implications can't surface that risk before the assignment is made, only after, when it's too late to change.
Availability by day, not just by week. A person who looks available across a week at a glance might actually be fully booked for three specific days and free for two, which matters a great deal when planning handoffs between team members on the same project.
Time off alongside project assignments, in the same view. Capacity plans that live separately from holiday calendars routinely lead to a team member being scheduled for work during time they'd already booked off, discovered only when they raise it, usually later than anyone would like.
Utilisation trends, not just a snapshot. Someone who's slightly over capacity this week might be a one-off blip, or might be the fourth week in a row of the same pattern. Only a trend view distinguishes between the two, and only the second case actually needs intervention.
The link to margin, not just hours. Ideally, a capacity view should make it obvious, before an assignment is confirmed, what that assignment does to the project's likely margin given that person's cost rate against the client's billing rate.
Dedicated scheduling tools are genuinely good at the pure availability problem, and for a firm whose only need is avoiding double-bookings, that may be entirely sufficient. Where they typically stop is the connection to financials. Float, Runn and Resource Guru are built primarily as visual schedulers, and adding budget or margin context to a staffing decision usually means switching to a separate tool, or a spreadsheet, to check whether an available person is also the financially sensible choice.
For a small team with simple, similar-margin projects, this gap may rarely matter in practice. For a firm running a mix of fixed-price and time-and-materials work, with meaningful variance in seniority and billing rates across the team, it's a gap that shows up regularly, usually in the form of a project that looked fine on a schedule and turned out thinner than expected on margin.
The firms that get the most out of capacity planning treat it as a standing weekly review rather than something checked only when a new project comes in. A short, regular look at who's over or under capacity across the coming two to four weeks catches overload before it becomes burnout or missed deadlines, and catches underutilisation before it becomes a quarter of unbilled time that only shows up in the numbers after the fact.
Hourglass's planner shows scheduled assignments by day and by person, alongside time off, in a single drag-and-drop view. Because it sits inside the same platform as budgeting and billing rates, staffing an assignment and seeing its effect on project margin happen in the same place rather than requiring a separate check. Utilisation reporting shows trends over time, not just a current snapshot, so a project manager can tell the difference between a one-off busy week and a pattern that needs addressing.
For a firm whose only need is visual scheduling, a dedicated tool may be sufficient on its own. Hourglass is built for firms that want scheduling connected directly to budgets, billing rates and profitability, rather than as a separate step.
Yes. Time off indicators sit in the same weekly view as scheduled project work, so a manager sees both without checking a separate calendar.
Because billing rates, cost rates and project budgets live in the same platform as the planner, the financial implication of an assignment is visible without switching tools or exporting data elsewhere.
Capacity planning connected directly to budgets and billing rates, so every staffing decision is a financial decision made with the right information.
Project profitability, utilisation tracking, resource planning — all in one platform built for UK professional services firms.
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