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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
Billable work5 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

Billable work

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

Billable ExpensesExpenses
Clients and estimatesInvoice preparationRecurring billingPayments and reconciliationBillable workCollections and reporting
BillableToClient = trueRecorded
Expense NumberExpense DateVendorClientAmountStatus
EXP-1591522 SepVND-797CUS-137920Recorded
EXP-4265323 SepVND-881CUS-003770Recorded
EXP-5279620 SepVND-439CUS-072610Recorded
EXP-7864808 SepVND-667CUS-016250Recorded
EXP-6245722 SepVND-336CUS-141280Recorded
EXP-7152728 SepVND-582CUS-122320Recorded
Records in this module
  • Expenses
  • TimeEntries
  • InvoiceLines
  • Invoices
  • Clients
  • Items

Keep the business context together

Capture the work date, client, description, time or expense amount and supporting receipt before billing. Keep original source references on invoice lines so the team can explain the charge. Billable and non-billable entries share a history without being mistaken for invoices or completed payments.

When the bookkeeper builds the invoice, source links connect each charge to its time or expense entry. Those links make a customer question answerable: which day the work was done, which rate was used and which receipt supported the expense. The issued line preserves the billed amount even if a future rate changes.

Give each decision a clear owner

Assistant manages their own entries. Bookkeeper reviews customer attribution, rate and any markup before adding them to a draft invoice. Marking a source as billed is tied to the successful creation of its invoice line; the state must not change when the invoice operation fails.

Two people preparing invoices at the same time may both find the same unbilled expense. Only one draft can reserve that source for billing. If the invoice-line creation fails, the source remains available; if an unissued draft line is deliberately removed, its reservation can be released with the reason retained.

Handle exceptions with the original record

Prevent the same expense or time entry from appearing on competing invoices. Removing an unissued draft line releases its reservation with an audit event. Correcting work already billed requires a documented invoice correction; changing the original hours must not silently alter a sent document.

A fixed-fee agreement and hourly work require different descriptions. Recording hours can still support internal review without making every hour billable. The bookkeeper should choose the agreed rate and billing treatment, verify any markup and ensure that non-billable entries remain excluded from the invoice total and customer document.

Find the work that needs attention

Use the billable expense and time views to review work before the billing cutoff. Entries missing a customer, date, description or receipt need attention before invoicing. Filtering the queue by customer helps group the work, but access still follows the assistant or bookkeeper role and the underlying business scope.

Configure it around your business

Configure default items, allowed rates and supporting-document requirements around the services you actually sell. Review one mixed invoice containing time, expenses and a non-billable entry. Its customer total should include only the selected billable sources, and its retained links should explain those charges without exposing another employee’s restricted work.

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
  • 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
  • Expenses
  • TimeEntries
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
  • Expenses
  • TimeEntries
  • Invoices
  • Items
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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