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ERP.AI Invoicing & Billing System

Invoicing & Billing System

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Modules

Clients and estimatesAgree the work and payment terms before creating an invoice. Invoice preparationPrepare invoices with clear lines, due dates and a preserved document history. Recurring billingManage retainers and repeat invoices from an explicit billing schedule.
Payments and reconciliationConnect customer receipts to invoices and check their actual payment outcome. Billable workBring approved expenses and recorded time into the right customer invoice. Collections and reportingFollow up on outstanding invoices with the right customer context.

Invoicing & Billing System

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Processes

Estimate to invoiceCarry the customer’s accepted scope, prices and tax treatment into a supported invoice. Recurring billing to collectionRun repeat billing on the agreed schedule and follow each invoice through confirmed collection.
Receipt to reconciliationSee what was billed, what has actually been collected and which balances still need follow-up. Billable work to invoiceTurn recorded time and reimbursable expenses into an invoice your customer can trace back to the work.

Invoicing & Billing System

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Industries

Professional servicesConsultancies and independent specialists billing agreed work and reimbursable expenses. Retainer businessesAgencies and service providers invoicing repeat commitments.
Field service businessesSmall service teams capturing billable time and expenses away from the office.

Invoicing & Billing System

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Reference

Roles and permissionsGive each person the records and decisions their work requires. Reports and analyticsRead operational and financial results with their source context. Data modelSee the records and references behind the product.
AI and integrationsConnect the services that own the related business results. ImplementationConfigure the system around your business records and responsibilities. Proto configuration guideUse Proto to configure and maintain the same product described on this website.

Invoicing & Billing System

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Pricing Questions and answers Get started
Build with Proto
All systems
Modules
Clients and estimatesAgree the work and payment terms before creating an invoice.Invoice preparationPrepare invoices with clear lines, due dates and a preserved document history.Recurring billingManage retainers and repeat invoices from an explicit billing schedule.Payments and reconciliationConnect customer receipts to invoices and check their actual payment outcome.Billable workBring approved expenses and recorded time into the right customer invoice.Collections and reportingFollow up on outstanding invoices with the right customer context.
Processes
Estimate to invoiceCarry the customer’s accepted scope, prices and tax treatment into a supported invoice.Recurring billing to collectionRun repeat billing on the agreed schedule and follow each invoice through confirmed collection.Receipt to reconciliationSee what was billed, what has actually been collected and which balances still need follow-up.Billable work to invoiceTurn recorded time and reimbursable expenses into an invoice your customer can trace back to the work.
Industries
Professional servicesConsultancies and independent specialists billing agreed work and reimbursable expenses.Retainer businessesAgencies and service providers invoicing repeat commitments.Field service businessesSmall service teams capturing billable time and expenses away from the office.
Reference
Roles and permissionsGive each person the records and decisions their work requires.Reports and analyticsRead operational and financial results with their source context.Data modelSee the records and references behind the product.AI and integrationsConnect the services that own the related business results.ImplementationConfigure the system around your business records and responsibilities.Proto configuration guideUse Proto to configure and maintain the same product described on this website.
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Invoicing & Billing System Modules
Invoice preparation2 of 6
  • Clients and estimates1 of 6
  • Invoice preparation2 of 6
  • Recurring billing3 of 6
  • Payments and reconciliation4 of 6
  • Billable work5 of 6
  • Collections and reporting6 of 6

Invoice preparation

Prepare invoices with clear lines, due dates and a preserved document history.

Draft InvoicesInvoices
Clients and estimatesInvoice preparationRecurring billingPayments and reconciliationBillable workCollections and reporting
Draft
  • INV-82687 CUS-112 2 d
  • INV-38571 CUS-122 3 d
  • INV-48909 CUS-061 10 d
  • INV-55787 CUS-015 5 d
  • INV-44420 CUS-145 10 d
INV-82687
Client
CUS-112
IssueDate
15 Sep
DueDate
23 Sep
Total
780
Status
Draft
Records in this module
  • Invoices
  • InvoiceLines
  • Clients
  • Items
  • SalesTaxRates

Keep the business context together

Review the customer, invoice date, payment terms, descriptions and taxable treatment while the invoice is a draft. The amount due comes from preserved line quantities, rates and configured tax amounts. The sent PDF and line snapshot retain the exact document the customer received even after the item catalogue changes.

The invoice number identifies the business document; a delivery attempt identifies an email or download event. Sending the same issued invoice again keeps its number and amount. This distinction helps the team answer a customer who lost the original message without creating another invoice or adding the charge to receivables twice.

Give each decision a clear owner

Assistant sends their own prepared invoices within role scope. Bookkeeper and Owner / Admin can maintain drafts and manage corrections. Monetary totals are computed by the server; changing a displayed status must never create a payment or change the original issued amount.

Due dates follow the terms on the document, rather than whatever default happens to be set on the client today. If the client normally pays after thirty days, preserve that basis when issuing the invoice. Changing future client terms must not unexpectedly move the due date of invoices already sent or change their aging.

Handle exceptions with the original record

A paid invoice cannot be erased or casually voided. Refunds and disputes follow the payment provider result and the retained payment history. A duplicate send command must preserve the invoice number and document revision while tracking the delivery attempt separately.

Use Draft Invoices to compare unfinished charges before issue. A missing description, incorrect customer or inconsistent tax calculation belongs in preparation. Once the document is issued, its preserved lines and PDF provide a stable reference for collection, customer questions and any subsequent correction authorized by the owner or bookkeeper.

Find the work that needs attention

For opening balances, distinguish historical invoices from new documents that should be sent. Bring the original number, customer, currency and verified remaining amount into the import review. Recording a prior invoice as a fresh bill would confuse the customer and distort the collection queue, even if the numeric balance appears correct.

Configure it around your business

Configure numbering, issue permissions and document delivery with representative invoices before routine use. Include a tax-bearing invoice, a partially paid invoice and a corrected historical charge in that review. The customer-visible amount, the invoice balance and the related payment history should tell the same story after each permitted action.

Modules

  • Estimates Awaiting ApprovalSent
    Estimate NumberClientIssue DateExpiry Date

    Clients and estimates

    Agree the work and payment terms before creating an invoice.

  • Draft InvoicesDraft
    Invoice NumberClientIssue DateDue Date

    Invoice preparation

    Prepare invoices with clear lines, due dates and a preserved document history.

  • Active Recurring SchedulesActive
    Schedule NumberClientNameFrequency
    Bi Weekly

    Recurring billing

    Manage retainers and repeat invoices from an explicit billing schedule.

  • Recent PaymentsCleared
    Payment NumberInvoiceClientMethod
    ACH

    Payments and reconciliation

    Connect customer receipts to invoices and check their actual payment outcome.

  • Billable ExpensesRecorded
    Expense NumberExpense DateVendorClient

    Billable work

    Bring approved expenses and recorded time into the right customer invoice.

  • Pending RemindersScheduled
    InvoiceReminder TypeScheduled AtChannel
    Overdue Day7

    Collections and reporting

    Follow up on outstanding invoices with the right customer context.

Roles and permissions

Owner / Admin

Owner / Admin works within the record, field and action scope below.

Permissions and records
  • Manage business configuration, provider connections and role assignments
  • Manage Clients, Items and SalesTaxRates
  • Prepare and send Estimates and Invoices
  • Record evidenced offline client decisions and convert accepted Estimates
  • Clients
  • Items
  • SalesTaxRates
  • Invoices
Draft InvoicesInvoices
Draft
  • INV-82687 CUS-112 2 d
  • INV-38571 CUS-122 3 d
  • INV-48909 CUS-061 10 d
  • INV-55787 CUS-015 5 d
  • INV-44420 CUS-145 10 d
INV-82687
Client
CUS-112
IssueDate
15 Sep
DueDate
23 Sep
Total
780
Status
Draft
Bookkeeper

Bookkeeper works within the record, field and action scope below.

Permissions and records
  • Manage Clients, Estimates and draft Invoices
  • Record evidenced offline client decisions and convert approved Estimates
  • Maintain agreed RecurringSchedules
  • Record evidenced manual Payments
  • Invoices
  • Clients
Draft InvoicesInvoices
Draft
  • INV-82687 CUS-112 2 d
  • INV-38571 CUS-122 3 d
  • INV-48909 CUS-061 10 d
  • INV-55787 CUS-015 5 d
  • INV-44420 CUS-145 10 d
INV-82687
Client
CUS-112
IssueDate
15 Sep
DueDate
23 Sep
Total
780
Status
Draft
Assistant

Assistant works within the record, field and action scope below.

Permissions and records
  • Manage own draft Estimates, Invoices, Expenses and TimeEntries
  • Send own valid Estimates and Invoices
  • View Items and SalesTaxRates
  • No customer acceptance decisions, voids, payment edits, provider configuration or tax filings
  • Invoices
  • Items
  • SalesTaxRates
Draft InvoicesInvoices
Draft
  • INV-82687 CUS-112 2 d
  • INV-38571 CUS-122 3 d
  • INV-48909 CUS-061 10 d
  • INV-55787 CUS-015 5 d
  • INV-44420 CUS-145 10 d
INV-82687
Client
CUS-112
IssueDate
15 Sep
DueDate
23 Sep
Total
780
Status
Draft

Related processes

Estimates Awaiting ApprovalSent
Estimate NumberClientIssue DateExpiry Date

Estimate to invoice

Carry the customer’s accepted scope, prices and tax treatment into a supported invoice.

4 stages · 1 approval

Draft InvoicesDraft
Invoice NumberClientIssue DateDue Date

Recurring billing to collection

Run repeat billing on the agreed schedule and follow each invoice through confirmed collection.

4 stages · 0 approvals

Draft InvoicesDraft
Invoice NumberClientIssue DateDue Date

Receipt to reconciliation

See what was billed, what has actually been collected and which balances still need follow-up.

4 stages · 0 approvals

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