Everhour turns tracked development time and expenses into invoices, while developer invoices still need clear project and payment details.
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A software developer invoice should turn work performed into a document the client can review, approve, and pay. Include seller and buyer names, invoice number, issue date, due date, line items, subtotal, tax line when applicable, total due, payment terms, and remit-to details. Line items should name the work in client language, such as backend API development, bug fixes, QA support, maintenance, or consulting.
Keep the invoice distinct from related documents. A quote or estimate offers a price before work starts. An invoice asks for payment after billable work, a milestone, or a contracted billing period. A receipt confirms payment received. For United States private-sector work, there is no prescribed federal invoice form, but invoices support records that show income, expenses, amounts, and sources of gross receipts.
Developer billing usually breaks down by project, milestone, retainer period, or time-and-materials work. A useful invoice line names the deliverable, the billing basis, the quantity, and the rate. For example, "API endpoint development, 12 hours × $125" gives the client more context than "development services." Fixed-fee work can use one line for the milestone and separate lines for approved expenses.
Billable and non-billable time need a clean boundary before the invoice is sent. Discovery calls, internal refactoring, deployment support, and urgent fixes may follow different contract rules. List only approved billable work unless the client expects a supporting detail report. If the client requires purchase order numbers, project codes, task IDs, or acceptance references, place those details where the accounts payable team can find them quickly.
United States software developer invoices do not use a national VAT or GST invoice regime. Sales and use tax obligations come from state and local rules, including nexus, the product or service sold, and where the sale is sourced. Service taxability varies by state and service type. 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.
Use a tax line that matches the actual obligation instead of adding a flat tax percentage to every invoice. Sellers that make taxable sales may need a state-level sales-tax registration, such as a California seller's permit for retailers engaged in business in California selling taxable tangible personal property. For federal contracts, FAR proper-invoice rules are more specific and can require contract references, line-item details, remittance information, and TIN or EFT banking data when agency procedures require them.
A one-off invoice app is enough when you need a single PDF for one client, one billing period, and a small set of line items. It also works for a quick fixed-fee milestone, a simple consulting invoice, or a developer who already tracks time elsewhere and only needs a clean document for payment.
A managed workflow is better when tracked billable time, expenses, rates, client defaults, and invoice status must stay connected. Everhour Billing & Invoicing converts uninvoiced billable time and expenses into invoices, calculates amounts from rates while excluding non-billable work, and exports invoices to QuickBooks Online, Xero, or FreshBooks as drafts. That workflow reduces re-keying when development work spans projects, clients, and billing periods.
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 software developer invoice should include seller and client details, invoice number, issue date, due date, line items, quantities, rates, subtotal, tax line when applicable, total due, payment terms, and remit-to information. Developer invoices also benefit from project names, task descriptions, milestone labels, purchase order numbers, and approved expense details when the client uses those fields for review.
The contract should decide the structure. Time-and-materials work usually needs hours, rates, and descriptions tied to approved work. Fixed-fee work usually needs milestone names, completion dates, and the agreed amount. Retainers often use the billing period and covered scope. Mixing these models on one invoice is fine when each line clearly states its billing basis.
A United States software developer invoice needs sales tax only when state and local rules require it for the sale. The United States has no national VAT or GST invoice regime. Service taxability varies by state and service type, and remote-seller obligations depend on each state's nexus rules. Apply tax based on the buyer, sale location, service type, and registration obligations.
An invoice app should store a Taxpayer Identification Number only when the workflow requires it and the data is handled securely. Businesses commonly provide TIN details through Form W-9 to payers that must file IRS information returns. Federal contract invoices include a TIN only when agency procedures require it, so private-sector invoices do not need a blanket TIN field.
Unclear line items delay payment because the reviewer cannot connect the charge to approved work. Replace vague labels such as "software services" with project names, sprint dates, task groups, quantities, rates, and contract references. Add the purchase order number or billing contact when the client requires one. A precise invoice helps finance approve payment without asking the project manager for backup.
Everhour Billing & Invoicing converts tracked billable time and expenses into client invoices. It calculates invoice amounts from project or member rates, excludes non-billable tasks, supports client defaults such as taxes, discounts, and payment terms, and exports invoices to QuickBooks Online, Xero, or FreshBooks with status details synced back to Everhour.
Everhour reports can show billable time, non-billable time, billable amount, cost, invoice status, and project details by member or task. Teams can filter, group, and export reports in CSV, Excel/XLSX, or PDF format, so invoice backup and internal profitability checks come from the same tracked time records.
Convert approved billable time, expenses, rates, and client terms into invoices without rebuilding timesheets manually. Everhour keeps developer billing records connected from tracked work to invoice status.
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