Everhour keeps project rates and billable work organized, while government invoices demand contract-specific payment detail.
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A government invoice is a payment request for property delivered or services performed. For federal vendor payments, the invoice may be a bill or an electronic transmission, and some contracts may designate a receiving report or delivery ticket as the invoice. Your goal is a document that the billing office can match to the authorization, acceptance record, and payment instructions without asking for missing details.
Private-sector U.S. invoices do not follow one prescribed federal format, and the United States does not use a national VAT or GST invoice regime. Government invoices are different because the contract controls the payment request. Federal contractor invoices must identify the contract number or other authorization, including the order number and line item number where applicable.
A proper federal invoice generally needs the vendor name, invoice date, government contract or authorization number, vendor invoice or account identifier, and a description with price and quantity for the goods or services. It also needs shipping and payment terms, contact information, remittance details, and any contract-required substantiation. TIN and banking information apply unless agency procedures waive or exclude them.
Line items should mirror the contract structure. A time-and-materials invoice commonly separates labor hours at contract-specified fixed hourly rates from actual material costs, such as direct materials, certain subcontracts, travel, and applicable indirect costs. A cost-reimbursement invoice follows the contract's Allowable Cost and Payment rules, and except for small business concerns, payment requests generally cannot be submitted more often than once every two weeks.
A federal billing office must return an improper invoice with reasons within 7 days after receipt, with shorter windows for certain perishable and food-related categories. Missing contract references, unclear line item numbers, unsupported charges, or a mismatch between invoice totals and accepted work can turn a routine payment request into a rejected one. The invoice should make the approver's match process obvious.
The ordinary federal payment due date is the later of 30 calendar days after the designated billing office receives a proper invoice or 30 calendar days after government acceptance, unless a contract clause or special payment rule sets a different date. For January 1 through June 30, 2026, the U.S. Treasury Prompt Payment interest rate is 4.125% for qualifying late federal vendor payments.
A one-off template is enough for a simple government invoice when the contract reference, line items, acceptance status, payment terms, tax details, and remittance data are already clear. It also works for a single PO-driven bill where you only need a clean PDF or document for submission through the required agency channel.
A managed workflow becomes necessary when billable labor, internal cost, dated rate changes, and project-specific rates feed the invoice. Everhour separates cost and billable rates, supports per-person defaults and per-project overrides, preserves dated rate history, and prices billable work by project, member, or task so government-facing invoices start from controlled time and rate data.
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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A private U.S. invoice mainly serves as a recordkeeping and contract document, with no single federal private-sector invoice format. A federal government invoice follows the contract and FAR proper-invoice rules, so it must connect the payment request to the contract, order, line item, payment terms, vendor data, and required substantiation.
A federal contractor invoice must identify the contract number or other authorization for the supplies delivered or services performed. The invoice should also include the order number and line item number where applicable, plus descriptions, quantities, unit prices, extended prices, payment terms, remittance details, contact information, and required tax or banking identifiers.
Federal procurements commonly use electronic invoicing systems. OMB directed agencies to transition appropriate federal procurements to electronic invoicing by the end of FY 2018. Vendors required to use the Invoice Processing Platform are enrolled by the agency, then use IPP to view purchase orders, submit invoices, and access payment information.
A billing office can reject an invoice that lacks required fields, references the wrong contract or order, omits required substantiation, uses unclear line items, or sends the payment request to the wrong office. For federal invoices, the designated billing office must return an improper invoice with reasons within 7 days after receipt, subject to shorter special windows for certain products.
The United States does not use a national VAT or GST invoice regime. Sales and use tax obligations come from state and local rules, where applicable. A federal invoice should follow the contract, agency instructions, and any applicable state or local tax treatment rather than adding a VAT or GST registration number.
Everhour separates internal cost rates from client-facing billable rates, with default per-person rates and per-project overrides. Rate changes can be dated, so older reports keep their original calculations while new government project work uses the correct rate from the chosen effective date.
Everhour Billing & Invoicing converts tracked billable time and expenses into client invoices, calculates amounts from rates and billable expenses, and excludes non-billable work. Invoice line items can be grouped by project, task, person, date, or another available breakdown before export to QuickBooks Online, Xero, or FreshBooks.
Track billable labor, rate changes, and project charges before invoice time. Everhour turns controlled time and rate data into clearer government billing.
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