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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
Recurring billing3 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

Recurring billing

Manage retainers and repeat invoices from an explicit billing schedule.

Active Recurring SchedulesRecurringSchedules
Clients and estimatesInvoice preparationRecurring billingPayments and reconciliationBillable workCollections and reporting
Active
Schedule NumberClientNameFrequencyStart DateEnd Date
RS-99029CUS-085Schedule 928Weekly16 Sep22 Sep
RS-43022CUS-119Schedule 768BiWeekly14 Sep17 Sep
RS-44035CUS-010Schedule 575Monthly21 Sep25 Sep
RS-64799CUS-237Schedule 645Quarterly13 Sep18 Sep
RS-80884CUS-066Schedule 756Annual25 Sep27 Sep
RS-29283CUS-197Schedule 676Weekly12 Sep20 Sep
Records in this module
  • RecurringSchedules
  • RecurringScheduleLines
  • Invoices
  • InvoiceLines

Keep the business context together

Each recurring schedule connects a client, frequency, start and end dates, next run and reusable lines. Review whether a run creates a draft or sends an invoice automatically. A schedule forecasts billing; it does not prove delivery of work or create a settled payment. Paused and ended schedules remain available for review.

Decide whether each recurring arrangement produces a draft for review or an invoice ready to send. A variable service charge may need a bookkeeper to inspect the period before issue. A fixed retainer can use the agreed automatic path when its customer terms, dates and payment permissions have been configured and checked.

Give each decision a clear owner

Owner / Admin controls automatic charging and payment-provider permissions. Bookkeeper maintains agreed schedules within those controls. Each occurrence needs a stable schedule-and-date identity, so overlapping workers or a retried job cannot create a second invoice for the same billing period.

Missing a scheduled run requires a clear catch-up decision. The team may need the missed period billed separately, or may need to review whether the service was actually provided. Preserve the intended occurrence date when processing the delayed work; the day a worker retries the job must not become a second billing occurrence.

Handle exceptions with the original record

An overdue job must apply the configured catch-up policy and stop at the end date. Editing future template lines leaves older invoices unchanged. A missing payment mandate or unavailable provider leaves the invoice open with an actionable result rather than recording a successful charge.

Pausing a schedule stops future generation. It does not cancel already issued invoices, remove an overdue balance or imply that a payment mandate has been withdrawn. Review those records separately when a customer suspends service, and retain the pause date so the team can explain exactly which periods were billed.

Find the work that needs attention

The schedule view shows start, end and next run dates together. A next run beyond the agreed end date should never generate another invoice. Where an arrangement has no final date, retain its cancellation and pause controls and review customer changes before the next occurrence is claimed by the scheduler.

Configure it around your business

Use Proto to configure the supported frequency, calendar behavior, catch-up policy and line descriptions for each arrangement. Verify the first two occurrences and a pause/resume example against the agreement. The desired outcome is predictable billing with one identifiable invoice per period, including when a job is interrupted or processed again.

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.

Reports

All reports

Recurring Revenue Pipeline

Active RecurringSchedules with projected next 90 days of invoices (Frequency × Rate × OccurrencesRemaining). The MRR-style forward look for a retainer-heavy business.

Active Recurring SchedulesRecurringSchedules
Active
Schedule NumberClientNameFrequencyStart Date
RS-99029CUS-085Schedule 928Weekly16 Sep
RS-43022CUS-119Schedule 768BiWeekly14 Sep
RS-44035CUS-010Schedule 575Monthly21 Sep
RS-64799CUS-237Schedule 645Quarterly13 Sep
RS-80884CUS-066Schedule 756Annual25 Sep
RS-29283CUS-197Schedule 676Weekly12 Sep

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
  • 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
  • RecurringSchedules
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
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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