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Freelance Proposal Billable Capacity Estimator

Estimate how many hours of proposal work you can realistically sell and deliver within a typical week. This calculator separates your total working time from meetings, administration, sales follow-up, and other non-billable work so the remaining hours reflect practical client capacity.

It is useful when you are deciding how many proposal projects to accept at once, setting turnaround promises, or checking whether a pipeline is larger than your available delivery time. The result shows both billable hours and an approximate number of proposal projects per week based on your average hours per proposal.

Weekly capacity inputs

hr/week
hr/week
hr/proposal
Result
—
Billable capacity per week
Available billable hours—
Proposal projects / week—
Billable share—

1. Set your weekly work time
Enter the total hours you plan to work in a normal week, not a theoretical maximum.

2. Remove non-billable time
Enter time used for admin, calls, sales activity, bookkeeping, and other work you cannot invoice to proposal clients.

3. Estimate effort per proposal
Use the average hands-on hours needed to prepare and deliver one proposal project.

4. Review practical capacity
Compare the billable hours with the estimated projects per week before accepting additional work.

Billable capacity = Weekly working hours − Non-billable hoursProposal projects per week = Billable capacity ÷ Average hours per proposal

Billable share = Billable capacity ÷ Weekly working hours × 100. The model assumes the entered week is representative and that proposal projects require roughly similar effort.

What the result means

The main result is the weekly time that remains available for billable proposal delivery after the non-billable hours you entered.

Results depend on the assumptions you enter; use realistic inputs and update them when workload, costs, or pricing conditions change.

Given:

  • Weekly working hours = 42 hr
  • Non-billable hours = 13 hr
  • Average proposal effort = 5.5 hr

Calculation:
Billable capacity = 42 − 13 = 29 hr/week
Projects per week = 29 ÷ 5.5 = 5.27
Billable share = 29 ÷ 42 × 100 = 69.0%

Result:
29.0 billable hours per week, or about 5.27 average-size proposal projects.

This is a planning ceiling, not a requirement to book every available hour. Leaving additional slack can protect deadlines when client feedback or revisions expand.

Should I count sales calls as billable time?

Only count them as billable if your client actually pays for that time. Otherwise include them in non-billable hours so capacity is not overstated.

What if proposal sizes vary a lot?

Use a recent average for normal planning, or rerun the calculator with small and large project estimates. A single average can hide peak workload when projects differ substantially.

Does the projects-per-week result mean I should accept that many projects?

No. It is an estimate based on hours only and does not account for deadline overlap, client delays, or context switching.

Can I use monthly hours instead of weekly hours?

The fields are designed around a weekly period. Convert all inputs to the same weekly basis before entering them.

How is this different from a required rate calculator?

Capacity estimates how much time you can sell; a required rate calculator estimates the price per billable hour needed to meet an income target. Together they connect workload limits with pricing.