Everhour tracks billable work inside project tools, while this page explains the USD invoice math behind service hours.
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Working hours in the period
Admin, meetings, internal work
Industry average is 75–80%
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A billable-hours total answers one practical question: how much client-facing work should appear on the invoice before collection, write-downs, or payment timing. On a Mac, the calculation is the same as on any other device; the useful workflow difference is keeping the source timesheet, contract rate, and invoice draft open side by side while you check entries.
The calculation separates billable hours from internal, administrative, or written-off time. It also separates pre-tax service value from any state or local tax that applies. The United States has no federal VAT/GST or national sales-tax rate for billed professional time, so U.S. service invoices need a jurisdiction-specific tax input only when that service is taxable.
For one rate, multiply approved billable hours by the agreed hourly rate. For multiple roles or service categories, calculate each line separately, then add the line totals. The basic formula is: billable amount = billable hours × billing rate. If tax applies, calculate it after the pre-tax billable amount, using the state or local rule that applies to the service and location.
For example, a product advisory project includes 18 approved strategy hours at $190 per hour and 29 approved implementation hours at $115 per hour. Strategy time equals $3,420, implementation time equals $3,335, and the pre-tax invoice value is $6,755. Non-billable status calls, proposal work, or internal review hours stay outside that invoice total unless the client agreement says they are billable.
The most common Mac workflow issue is not arithmetic; it is copying the wrong number from the wrong window. Keep the approved timesheet visible next to the invoice draft, and verify three fields before calculating: hour category, billable status, and rate. Browser autofill can save client names and dates, but it does not confirm whether a task is billable.
Use the calculator for a clean audit pass before sending an invoice. If the client agreement uses different rates by role, task, or date, enter each category as its own line instead of blending them into one average. 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.
A one-off calculator is enough when you have a small number of approved entries, one client, and a clear rate schedule. It is also enough for a pre-invoice check when tax is either not applicable or already supplied by the accounting file. The calculator gives the math; the source documents still decide what belongs in the total.
A managed workflow becomes necessary when billable status, task metadata, project budgets, and accounting handoff all need to stay connected. Everhour integrates with major project management and accounting tools, embeds tracking controls in supported workflows, syncs project and task metadata, and exposes timesheets and budgets inside work tools, which reduces duplicate entry before invoice review.
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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You need approved billable hours, the billing rate for each category, and any state or local tax input that applies to the service. Use USD for U.S. billable-hour totals. Keep non-billable hours visible for utilization or margin review, but exclude them from the client-facing invoice amount unless the agreement makes them billable.
No. A Mac does not change the formula, rate treatment, tax treatment, or invoice timing. The platform only changes the workflow. Use split view, tabs, or a separate monitor to keep the timesheet, agreement, and invoice draft visible while you check whether each time entry is billable.
Calculate each rate category separately, then add the line totals. Do not average rates when partners, associates, consultants, or support staff bill at different amounts. Separate lines make the invoice easier to verify and keep write-downs targeted to the right work category.
Tax belongs in the total only when the billed service is taxable under the relevant state or local rule. The United States has no federal VAT/GST or national sales-tax rate for billed professional time. Some jurisdictions tax certain services, and others do not, so the tax input must come from the applicable location and service category.
The biggest mistake is copying total worked time instead of approved billable time. Internal planning, sales calls, admin cleanup, and written-off entries can inflate the invoice if they remain mixed with billable work. Filter the source timesheet by billable status before calculating the client-facing amount.
Everhour embeds tracking controls inside supported tools such as Asana, ClickUp, GitHub, Jira, Monday, Notion, Trello, and others. Project and task metadata sync into Everhour, so billable time can stay tied to the same work structure teams already use before invoicing.
Everhour Billing & Invoicing turns tracked billable time and expenses into invoices, then exports invoices to QuickBooks Online, Xero, or FreshBooks. Invoice status, number, issue date, and amount sync back to Everhour, keeping billing reports connected after the accounting handoff.
Connect approved work to project context before invoice review. Everhour embeds time tracking in work tools and carries synced task data into billing workflows for cleaner billable-hour totals.
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