Everhour turns tracked client time into invoice-ready totals, but accurate charges still start with clean hours and rates.
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An hourly billing calculation answers one practical question: how much should the client be charged for approved billable work. The base result comes from multiplying billable hours by the agreed hourly rate. If a project uses more than one role, person, task type, or matter rate, each line needs its own hours and rate before the subtotals are added.
The calculation also shows what is not included. Non-billable admin time, internal meetings, write-downs, discounts, and expenses should stay separate unless the client agreement says they belong on the invoice. In the United States, hourly billing totals are normally shown in U.S. dollars, and any state or local tax input belongs after the service is confirmed taxable in that jurisdiction.
Most hourly billing errors start before the formula. If the contract bills in 0.1-hour increments, a 7-minute entry rounds differently than it would under a 15-minute increment. The billing unit should match the engagement letter, statement of work, client contract, or firm policy before you multiply by the rate.
Rounding should be applied consistently to each time entry or approved line, depending on the billing policy. Reconstructed time is riskier than timer-based capture because small estimates compound across dozens of entries. A project with 38 entries rounded incorrectly by 3 minutes each creates 114 extra minutes, or 1.9 hours, before any rate is applied.
The basic formula is: billable hours × hourly rate = line total. For multiple rates, calculate each line separately, then add the line totals. If write-downs or discounts apply, subtract them before finalizing the amount due. Expenses, taxes, and payment terms should be handled as separate invoice fields, not hidden inside the hourly rate.
For example, a client operations review includes 21 approved advisory hours at $140 per hour and 13 approved compliance review hours at $95 per hour. The advisory line is $2,940, and the compliance line is $1,235. The pre-tax hourly billing total is $4,175 before expenses, discounts, or jurisdiction-specific tax treatment.
A one-off calculation is enough when you have final approved hours, one or two rates, no disputed entries, and no need to preserve a billing audit trail. It works for checking a draft invoice, estimating a small project, or confirming a client's expected charge before the invoice is prepared.
A managed workflow is better when billing depends on continuous time capture, billable and non-billable flags, approvals, expenses, and invoice status. Everhour Billing & Invoicing converts tracked billable time and expenses into invoices, calculates amounts from rates while excluding non-billable tasks, and can export invoices to QuickBooks Online, Xero, or FreshBooks.
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 applicable hourly rate, the billing increment, and any write-downs, discounts, or non-billable exclusions. For U.S. invoices, use U.S. dollars and add a state or local tax input only when the billed service is taxable in the relevant jurisdiction.
Use approved billable hours for the client charge. Worked hours can include internal planning, admin tasks, training, or other time that should not be billed. Keeping worked time separate from billable time protects utilization reporting and prevents non-billable work from inflating the invoice total.
Taxes come after the hourly billing subtotal. The United States has no federal VAT/GST or national sales-tax rate for billed professional time. Tax treatment is state and local, so a U.S. invoice needs a jurisdiction-specific tax input only when that service is taxable.
The hourly rate is the price assigned to billable work, such as $140 per hour. The effective billing rate compares billed revenue with total work time. If non-billable work, write-downs, or unpaid invoice amounts are included in the denominator, the effective rate drops below the stated hourly rate.
Yes. Calculate each rate category as its own line, then add the line totals. A single invoice can include partner time, associate time, consulting time, support work, or task-based rates, as long as the client agreement or billing policy supports those separate rates.
Everhour Billing & Invoicing converts tracked billable time and expenses into invoices, calculates invoice amounts from rates, and excludes non-billable tasks from billable totals. Invoices can be customized and exported to QuickBooks Online, Xero, or FreshBooks with invoice status synced back to Everhour.
Track billable time, exclude non-billable tasks, apply rates, and move approved charges into client invoices with Everhour Billing & Invoicing.
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