Everhour turns tracked billable work into invoices, while customizable invoice fields help match each client's billing requirements.
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| Description | Qty | Rate | Tax | Amount |
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Customizable invoicing software is for businesses that need more than one fixed invoice layout. You may bill one client by task, another by milestone, and another by time and materials. A useful invoice still has the core pieces: seller and buyer details, invoice number, issue date, due date, line items, subtotal, tax line when applicable, total, payment terms, and remit-to details.
The invoice is the request for payment. It is separate from a quote, an estimate, or a receipt. A quote or estimate comes before the work and sets expected pricing. A receipt proves payment already happened. Customization should make the invoice clearer for the buyer, with the right fields, terms, and line-item structure for the transaction.
Start with the fields every client needs to approve payment: legal business name, mailing or payment address, contact email, invoice date, due date, invoice number, and a plain description of the work. Add purchase order numbers, project codes, cost centers, or contract references only when the buyer uses them to route approval. Extra fields that do not support payment create noise.
Line items need enough detail to explain the charge without turning the invoice into a timesheet dump. A consulting invoice may group work by project and show hours, rate, and total. A design invoice may show a fixed project fee and separate reimbursable expenses. A recurring invoice may reuse the same services, terms, and contacts each billing cycle.
The United States does not use a national VAT or GST invoice regime, and ordinary private-sector invoices do not follow one federal invoice format. Sales and use tax treatment depends on state and local rules, nexus, product or service taxability, and the place of sale. A customizable invoice should let you set a tax line that matches the actual transaction instead of applying one flat rate to every client.
Service taxability also 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. Payment settings deserve the same care: payment method, due date, late-fee language, discounts, currency, and buyer-specific instructions should reflect your policy or contract.
A one-off customizable invoice is enough when you have a single buyer, a clear scope, and no need to reuse tracked time, expenses, or approval history. You enter the fields, check the tax treatment, export the finished invoice, and send it through your normal payment process. That works for occasional billing and simple service work.
A managed workflow becomes necessary when billable time, non-billable work, expenses, rates, client defaults, and invoice status must stay connected. Everhour Billing & Invoicing converts tracked billable time and expenses into invoices, calculates amounts from rates while excluding non-billable tasks, supports invoice customization, and exports 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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G2
Summer 2026
Best Ease Of Use
Capterra
Summer 2026
Rated in the top time trackers across G2, Capterra, and TrustRadius — with consistent praise for ease of use, integrations, and support.
A practical invoice editor lets you change seller and buyer details, invoice number, issue date, due date, line-item descriptions, quantities, rates, discounts, tax line, payment terms, remit-to details, notes, and branding. Client-specific fields such as purchase order number, project code, or contract reference also matter when the buyer uses them for approval.
Yes. A single invoice can include hourly work, fixed fees, expenses, discounts, and separate project lines if the layout keeps each charge clear. Use one line-item structure consistently inside the document. Mixing vague service descriptions with detailed time entries slows review because the buyer cannot see which charge belongs to which scope.
No. The United States does not have a national VAT or GST invoice regime, so there is no United States VAT or GST registration number for ordinary invoices. Sellers that make taxable sales may need state-level sales-tax registration, such as a seller's permit or sales-tax account where required by state rules.
No. Sales and use tax obligations depend on state and local rules, nexus, product or service taxability, and the place of sale. The correct tax line comes from the actual transaction. Some services are not taxable in some states, while other states tax defined service categories. Check the applicable state and local rule before adding tax.
Uncontrolled custom fields cause delays when they hide the information the buyer needs to approve payment. Missing purchase order numbers, unclear service dates, inconsistent line-item names, and tax lines that do not match the buyer's jurisdiction create avoidable back-and-forth. Keep custom fields tied to approval, accounting, tax treatment, or contract terms.
Everhour Billing & Invoicing converts tracked billable time and expenses into invoices, calculates amounts from rates, and excludes non-billable tasks. Client records can store contacts, taxes, discounts, and payment terms, while invoice customization covers branding, due dates, terms, discounts, taxes, language, and custom line items.
Everhour exports invoices to QuickBooks Online, Xero, or FreshBooks as drafts for accounting review. Invoice status, number, issue date, and amount sync back to Everhour, so billing reports can show invoiced and uninvoiced amounts without rebuilding records in a spreadsheet.
Convert approved time, expenses, rates, and client defaults into invoice-ready billing. Everhour Billing & Invoicing reduces manual re-entry and keeps invoice status tied to the original work record.
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