Professional invoices need clean billable totals, and Everhour keeps approved time, rates, and billing status organized.
Track billable vs. non-billable time and see your real utilization rate and revenue potential in seconds.
Working hours in the period
Admin, meetings, internal work
Industry average is 75–80%
The calculator gives you the number — Everhour takes it from there.
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Measurement
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A professional billable-hours calculation answers a practical invoice question: how much approved client work has monetary value before taxes, expenses, discounts, and collections. The useful output is not only total hours. You need billable hours, non-billable hours, the billable amount, any write-down, and the effective billing rate after adjustments.
This page fits work billed by hour, person, project, task, or matter. For U.S. professional services, amounts are normally denominated in U.S. dollars. The United States has no federal VAT/GST or national sales-tax rate for billed professional time, so any tax line needs a state and local input when the service is taxable.
A professional total starts with classification. Mark time as billable only when the client agreement, project scope, or matter rules allow it. Internal meetings, corrections, training, and administrative time often stay non-billable even when they are necessary to deliver the work. Mixing those categories inflates invoice value and makes utilization, realization, and profitability reports unreliable.
The professional workflow also needs a clear handoff from time capture to billing. Time entries should identify the client, project or matter, task, person, date, rate source, and approval status. For U.S. lawyers, ABA Model Rule 1.5 requires the scope of representation and the basis or rate of fees and expenses to be communicated in writing for new client-lawyer relationships, subject to the rule's limited low-cost exception.
The core formula is billable hours multiplied by the applicable rate, then adjusted for write-downs or discounts. For example, a professional advisory project has 21 approved analysis hours at $190 per hour and 13 approved documentation hours at $115 per hour. The raw billable value is $5,485. If the responsible manager writes down $275 before invoicing, the billed amount is $5,210.
That same example also separates four metrics. Utilization measures billable hours against total worked hours. Realization measures billed value against standard billable value, so $5,210 divided by $5,485 gives a 94.99% realization rate. Collection is measured later, after payment. Effective billing rate divides billed value by billable hours, so $5,210 over 34 hours equals $153.24 per hour.
A one-off calculator is enough when you need a fast check of approved hours, a single rate, and an invoice subtotal before tax. It also works for a quick comparison between raw billable value and a proposed write-down. Keep the source time entries nearby so the total can be traced if the client questions the invoice.
A managed workflow is the better fit when multiple people, rates, non-billable tasks, approvals, or invoicing handoffs are involved. Everhour supports billable and non-billable time through project billing status, task-level non-billable controls, custom task rates, member-rate exceptions, and admin reports for billable time, non-billable time, billable amount, and cost.
This content is for general information only, may not be fully up to date, and is provided without any warranty or liability.
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Include approved client work that the engagement, project, or matter allows you to invoice. Exclude internal administration, training, corrections, and any task marked non-billable by policy or contract. The clean total keeps billable hours separate from worked hours, then applies the correct client-facing rate.
A write-down reduces the invoice amount after the standard billable value is calculated. If approved time is worth $5,485 at standard rates and the manager removes $275, the billed amount becomes $5,210. The hours stay useful for utilization reporting, but realization falls below 100%.
No. The United States has no federal VAT/GST or national sales-tax rate for billed professional time. Tax treatment is state and local. Some services are not taxed, while taxable services need the correct jurisdiction-specific input, such as Texas taxable services at 6.25% state tax and up to 8.25% combined.
Worked hours measure effort. Billed hours measure client-chargeable time after exclusions, rounding, approvals, and write-downs. A professional can work 42 hours on a client week and bill 34 hours if the remaining time is internal review, non-billable correction, or out-of-scope work absorbed by the firm.
Payment timing matters after the invoice amount is set. For federal-agency vendor invoices, Prompt Payment rules generally use the contract date, accepted discount terms, an accelerated-payment rule, or 30 calendar days after receipt of a proper invoice. The Prompt Payment interest rate is 4.125% for January 1 through June 30, 2026.
Everhour lets admins set project billing status, mark specific tasks non-billable inside billable projects, use custom task rates, and set member-rate exceptions. Reports can show billable time, non-billable time, billable amount, and cost so invoice review does not require rebuilding totals from raw entries.
Everhour turns tracked billable time and expenses into invoices, calculates invoice amounts from rates and billable expenses, and excludes non-billable work. Invoice data can be grouped by project, task, person, date, or other available breakdowns before export to QuickBooks Online, Xero, or FreshBooks.
Track approved billable and non-billable time by project, task, and rate, then review billable amount and cost in Everhour before invoicing.
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