Everhour prices software work with flexible rates and billing records, while technology invoices still need clear scope and tax details.
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Software, IT services, and tech consulting invoices commonly follow one of three billing models: time and materials, fixed fee, or milestone billing. A time-and-materials invoice needs direct labor hours by role or person, fixed hourly rates, and separate reimbursable expenses. A fixed-fee invoice needs a scoped statement of work or estimate behind the amount charged.
Use the invoice to show the client exactly what changed hands. A sprint support line can show "Backend engineering, 18.5 hours at $125 per hour." A milestone line can show "Phase 2 API integration, approved scope dated March 5, 2026." Keep pass-through costs such as travel, computer usage, incidental services, or direct materials separate from labor so the same cost is not charged twice.
A credible technology invoice starts before billing. Software estimates should account for cost, schedule, personnel, quality, expected outcomes, and uncertainty. Project quotes and milestone plans need a scope, schedule, technical baseline, work breakdown, assumptions, data, methods, and risk. Those inputs keep the invoice tied to the work the client approved.
For time-and-materials work, recorded hours carry the invoice. Federal time-and-materials rules calculate labor from the applicable hourly rate multiplied by direct labor hours, with fractional hours paid proportionally. Federal vouchers also require substantiation such as individual daily job timekeeping records and records showing that employees meet contract labor-category qualifications.
The United States has no national VAT or GST invoice regime and no prescribed federal private-sector invoice form. Invoices usually serve as supporting business records that show income, expenses, transaction amounts, and sources of gross receipts. Sales and use tax treatment comes from state and local rules, nexus, the product or service sold, and where the sale occurs.
Technology sellers should avoid applying one blanket tax rule to every invoice. California generally taxes retail sales of tangible personal property and only some service or labor charges, while Texas defines 16 broad categories of taxable services. Remote seller rules also vary by state; South Dakota's law reviewed in South Dakota v. Wayfair applied at more than $100,000 in goods or services delivered into the state or 200 separate annual transactions.
A free invoice tool is enough for a single software project, a fixed milestone, or a clean one-client engagement. Enter the client, line items, payment terms, tax treatment, and due date, then keep the final invoice with the estimate, approval, and payment record. That workflow works when the invoice does not need a long trail of time entries.
A managed workflow becomes necessary when rates vary by developer, task, project, or date. Everhour separates cost and billable rates, supports default per-person rates with project overrides, preserves dated rate changes, and prices billable work by project, member, or custom task rate. That structure keeps technology invoices aligned with the actual commercial terms behind the work.
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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Use time and materials when scope, duration, or cost cannot be estimated confidently before work starts. Use fixed-fee or milestone billing when the client has approved a defined scope, phase, or deliverable. The invoice should follow the agreement, so a sprint support engagement shows hours and rates, while a scoped implementation shows milestone or fixed-fee lines.
Show the level of detail the contract or client approval process requires. Role-based lines work for many software teams, such as "Senior developer, 12 hours." Person-level lines work better when rates differ by team member or the client reviews individual time. Federal time-and-materials vouchers need substantiating daily job timekeeping records and labor-category qualification records.
United States invoices do not use a national VAT or GST registration number because the United States has no national VAT or GST invoice regime. Sellers that make taxable sales may need state-level sales-tax registration, such as a California seller's permit for retailers engaged in business in California selling taxable tangible personal property.
Keep reimbursable expenses separate unless the contract prices them inside the labor rate. Federal time-and-materials rules treat travel, computer usage, incidental services, and direct materials as materials or other direct costs. Separate expense lines make the invoice easier to review and reduce the risk of charging the same cost through both labor and pass-through expenses.
Federal technology contracts require closer invoice discipline than ordinary private-sector billing. FAR proper-invoice fields include contractor name and address, invoice date and number, contract or order reference, line details, payment terms, remittance details, defect-contact details, and TIN or EFT data when agency procedures require them. Most federal contract invoice payments use a 30-day timing standard.
Everhour separates internal cost rates from client-facing billable rates, with default per-person rates and per-project overrides. Rate changes can start on a chosen date, so older reports keep their original calculations while new technology work uses the updated project, member, or custom task rate.
Price software work from approved rates, dated rate changes, and billable project structure. Everhour gives technology teams cleaner invoices and stronger billing records.
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