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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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Build with Proto

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

Start now
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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Questions and answers

Answers about setup, permissions, corrections and connected work.

The system

Can an accepted estimate become an invoice?

Yes. Convert the accepted estimate into one invoice with the agreed client, lines, net amount, tax and total preserved. If the customer changes the scope, prepare a revised offer for acceptance before using those changed terms.

How do online payment links work?

The invoice links to your configured hosted payment checkout. Verified provider outcomes update the payment history; opening checkout or authorizing a charge does not by itself mark an invoice paid.

Can we include time and expenses on an invoice?

Yes. Review the client, hours, rate and supporting receipts, then add the selected billable entries to a draft. Source links explain each charge and prevent the same entry from being billed on competing invoices.

Can staff prepare invoices without seeing bank settings?

Assign the Assistant role for permitted drafts and billable entries. Bookkeeper and Owner / Admin responsibilities cover the wider billing work; payment configuration and restricted bank details remain separately controlled.

Will a paid customer still receive an overdue reminder?

The reminder checks the invoice again immediately before delivery. A fully paid or voided invoice is skipped, and partial-payment follow-up uses the remaining balance. A payment made after a message was already sent cannot recall that message.

How do we handle refunds or incorrect issued invoices?

Preserve the issued document and original payment history. Use the authorized correction or provider-confirmed refund process, with the reason and transaction references retained. Do not erase a paid invoice to hide its earlier amount.

Does this replace our accounting system?

It owns estimates, invoices, incoming receipts and billing history. Your general ledger and outgoing vendor payments remain in accounting. Sales-tax and contractor workpapers require their appropriate reviewed sources; incoming client receipts are not outgoing contractor payments.

Processes and approvals

How do I get started?

Click Start now to create your ERP.AI account, then use Proto to configure your clients, invoice numbering, tax treatment, recurring schedules and payment connection. Review an estimate, an invoice and a receipt with your bookkeeper before routine billing.

Can we automate monthly retainer invoices?

Configure a recurring schedule with the frequency, dates and lines agreed with your customer. Choose whether each occurrence creates a draft for review or sends an invoice. Pausing future billing preserves invoices already issued and any unpaid balances.

What if the customer makes a partial payment?

Keep the receipt against its invoice and follow up on the remaining collectible balance. Gross payment, processor fee and net deposit remain distinct so a processing fee is not mistaken for customer nonpayment.

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