By [verified author name], small-business software historian with [verified years] covering billing and payments technology
Last reviewed: July 10, 2026

Invoice2go is a mobile and web service that helps small businesses prepare estimates, issue invoices, collect or record payments, and organize customer billing records. It began as a response to accounting software that felt too complicated for straightforward invoicing and later became part of BILL, a larger financial-operations company. This independent explainer is not an Invoice2go or BILL publication.

What Invoice2go was built to solve

Invoice2go was founded in Australia in 2002, before smartphones became the normal place to run a service business. Contemporary accounts of its origin describe founder Chris Strode as wanting a faster way to create invoices without using a full accounting package whose broader features did not fit the immediate task.

The problem was narrow but common. A sole trader could finish a job, know exactly what the customer owed, and still face an awkward process involving desktop software, a handwritten form, or a document prepared later at home. Traditional accounting products could produce invoices, but they were often designed around the wider books of a company.

Invoice2go approached the transaction from the opposite direction. Start with the invoice. Keep the customer, line items, payment status, and related work close to that document. Add wider functions only where they support the billing process.

That origin helps explain the product today. Its centre of gravity remains accounts receivable, meaning money customers owe the business, rather than every financial activity that occurs inside the company.

The first framing distinction is this: Invoice2go was created to simplify customer billing, not to reconstruct the entire discipline of accounting in miniature.

From desktop invoicing to work done on a phone

Invoice2go predates the modern app economy, but its later identity became strongly mobile-first. BILL described it at the time of acquisition as a mobile-first accounts-receivable product for small businesses, freelancers, and sole proprietors. The current product continues to be offered through mobile applications and a web interface.

That shift matched a broader change in small-business work. The place where a job was completed became the place where the billing process could begin.

A plumber could prepare an invoice before leaving a property. A freelance photographer could issue a deposit request from a phone. A consultant could record billable time while moving between clients. The owner no longer needed to collect handwritten notes all week and turn them into invoices at a desk on Friday evening.

A useful analogy is the transition from a paper order pad to a connected front counter carried in a pocket. The invoice is created where the work happens, but it remains tied to customer records, payment status, reports, and other devices through the underlying service.

Mobile access also changed the expected speed of communication. It did not guarantee faster customer payment, since the customer still controls when and how a bill is paid. It shortened the delay between finishing work and asking to be paid.

Small gap. Large effect.

Why it expanded beyond invoice templates

A digital invoice maker can remain little more than a formatted document tool. Invoice2go expanded into a workflow product because billing rarely begins and ends with one PDF.

Its current product materials describe estimates, invoices, online payment options, expenses, projects, reports, clients, time tracking, and integrations. Project features can group estimates, invoices, expenses, photographs, files, notes, and contacts around the same job.

Each addition addresses something adjacent to invoicing:

An estimate records what the business proposes to do.
A project holds the context around the work.
A time entry captures labor that may later be billed.
An invoice states what the customer owes.
A payment record reduces the balance.
A report aggregates activity across documents.

The common confusion here is product breadth versus accounting depth. Adding expenses, projects, and reports makes Invoice2go broader than a template generator. It does not automatically give it every ledger, reconciliation, inventory, payroll, asset, liability, or financial-statement function associated with a complete accounting system.

The distinction resembles a workshop and its financial office. Invoice2go follows the job from quote to customer payment. Accounting software must also explain what that payment means for every part of the company’s books.

How estimates became part of the model

Estimates are a natural extension of invoicing because many businesses agree on scope and price before the final bill is issued.

A decorator may quote labor and materials before work begins. A graphic designer may define a project fee and request a deposit. A repair business may estimate a job before discovering the final number of replacement parts required.

Inside Invoice2go, the estimate can carry the customer and item details that may later be used on an invoice. This keeps the proposed transaction and final billing document connected rather than forcing the business to enter the same job twice.

The estimate also marks an important legal and commercial boundary. It is generally a proposal rather than proof that payment is due, though the precise contractual effect depends on the wording, customer acceptance, applicable law, and surrounding agreement. The invoice comes later as the payment request tied to the work or agreed transaction.

That distinction matters more than the visual similarity of the two documents. Both may contain item descriptions, quantities, rates, taxes, and totals, yet they represent different moments in the relationship.

Invoice2go’s evolution into estimates, deposits, and invoice conversion reflects the real sequence used by many service businesses rather than treating invoicing as an isolated clerical event.

Online payments changed what an invoice could do

An emailed invoice originally performed much the same function as a mailed one: it told the customer what was owed and where to send payment. Connecting the invoice to online payment options turned the document into an interactive checkout point.

Invoice2go says supported online transactions can be matched automatically to their invoices, allowing the document balance and related reports to be updated without a separate manual payment entry.

That connection joins two systems that remain conceptually separate.

The invoice identifies the customer, work, amount, and due date. The payment provider handles authorization and processing. The bank or financial account receives the eventual payout. Invoice2go keeps the billing record connected to those events.

A $900 invoice illustrates the sequence. The business sends the bill. The customer submits a card payment. The processor accepts and settles the transaction. The business’s invoice can be marked paid before the resulting deposit has completed every stage of bank posting.

This is why “the invoice was paid” and “the money is available” are not always descriptions of the same moment.

Payment-card activity also exists within the wider PCI DSS framework. The PCI Security Standards Council defines PCI DSS as baseline technical and operational requirements for protecting payment account data. The standard applies to the payment environment, not to the appearance of the invoice itself.

The second framing distinction is payment collection versus cash availability. Invoice2go can connect them, but it cannot make processing, settlement, and bank posting collapse into one universal instant event.

Is Invoice2go accounting software?

Invoice2go occupies the border between invoicing software and broader small-business finance software. It includes expenses, reports, client records, projects, online payments, and integrations, but its primary role remains billing and accounts receivable.

Full accounting software usually has to represent the whole financial structure of a company. That can include a chart of accounts, double-entry bookkeeping, bank reconciliation, accounts payable, assets, liabilities, equity, and formal statements.

Invoice2go can provide information used by that system. It can show what was invoiced, what remains unpaid, what payment was recorded, and what expenses were entered. Connected accounting software can then place selected information into the broader books.

Suppose a customer pays a $1,000 invoice and a processing charge is deducted before the payout reaches the bank. The billing layer identifies the $1,000 sale and customer payment. The accounting layer must also represent the processing expense and reconcile the net bank deposit.

The systems overlap. They answer different questions.

Invoice2go answers: Which customer was billed, and what remains due?

A payment processor answers: How was the electronic transaction authorized and settled?

An accounting system answers: How should the sale, fee, deposit, tax, and related expenses affect the company’s books?

For a solo contractor with straightforward operations, Invoice2go may cover much of the visible daily financial workflow. A business with detailed inventory, several entities, accrual accounting, or complex financial reporting will usually need systems beyond invoice-centred billing.

Why BILL bought Invoice2go

BILL announced in July 2021 that it had agreed to acquire Invoice2go in a stock-and-cash transaction valued at approximately $625 million. The acquisition was completed on September 1, 2021.

The stated logic was complementary financial operations. Invoice2go was strong in mobile-first accounts receivable for small businesses and sole proprietors. BILL had a wider platform focused on automating financial back-office work for small and midsize businesses.

Accounts receivable concerns money coming into a business from customers. Accounts payable concerns money the business owes suppliers and other parties. BILL also operates in expense and spend-management areas.

Invoice2go brought a different kind of user into that wider system: the self-employed tradesperson, consultant, freelancer, or small team that may begin its financial workflow on a phone rather than in an accounting department.

The acquisition FAQ described the combination as a way to connect Invoice2go’s invoicing, estimates, payments, time tracking, and customer tools with complementary services such as bill payment and back-office automation.

That did not erase the Invoice2go product identity. Invoice2go remained a distinct billing service within the BILL group rather than becoming merely another name for BILL’s entire platform.

What the acquisition says about small-business software

The acquisition reflects a broader industry direction: financial tools that once handled one task increasingly connect to adjacent stages.

A stand-alone invoice generator creates a bill. A connected billing service can create the bill, offer payment methods, match transactions, organize projects, pass data to accounting software, and provide the owner with a view of incoming cash.

This expansion is particularly relevant to very small businesses because they rarely have separate departments for sales, billing, collections, bookkeeping, and treasury. One person may perform every role.

A regional maintenance company with six employees might use Invoice2go to prepare estimates and send invoices, a payment provider to collect card transactions, an accountant to maintain the formal books, and BILL or another service to handle supplier payments. The software components form a chain around the business rather than one indivisible product.

That chain can reduce duplicate entry, though integrations have limits. A connection may transfer selected invoices, clients, or payment information without copying every historical record, attachment, setting, or accounting judgment.

Integration is not identity.

Invoice2go versus newer invoicing alternatives

The modern invoicing market contains several product shapes. Some services remain focused on sending basic invoices. Others are invoicing modules inside full accounting suites. A third group, which includes Invoice2go, begins with mobile billing and adds payments, projects, expenses, reminders, and connected applications.

Invoice2go’s historical strength is the mobile service-business workflow. The user can create the document close to the customer and the work rather than beginning inside an accountant-oriented ledger.

A full accounting suite may make more sense when bookkeeping depth is the deciding factor. A payment-company invoice tool may suit a business already centred on that provider. A dedicated billing system may fit recurring subscription or usage-based charges better than a field-service invoice app.

The comparison is not “simple product versus advanced product.” It is a question of which workflow sits in the centre.

For Invoice2go, that centre is the relationship between a small business, its job, its customer, and the money owed for that work.

Records remain wider than the application

Invoice2go can hold useful billing records, but a company’s legal, tax, and accounting documentation extends beyond one vendor.

The Internal Revenue Service says supporting business documents may include invoices, sales slips, receipts, deposit information, paid bills, and canceled checks. It also explains that an electronic recordkeeping system remains subject to the same general principles as a paper system.

An invoice establishes what was billed. A transaction record helps show what was paid. A bank statement helps document the deposit. A receipt supports an expense. Contracts and customer communications may establish the underlying agreement.

Invoice2go’s historical development does not change that basic limit. The platform can connect more of the workflow than its early versions could, yet it remains one source inside the company’s complete business record.

Requirements also vary by jurisdiction. Invoice content, sales taxes, electronic-invoicing rules, and record-retention periods can differ by country or state. A globally available app cannot make those rules uniform.

Invoice2go FAQ

When was Invoice2go founded?

Invoice2go was founded in Australia in 2002. Contemporary reporting says it was created in response to invoicing processes and accounting packages that felt unnecessarily complex for straightforward small-business billing.

Who owns Invoice2go now?

Invoice2go is part of BILL. BILL completed its acquisition on September 1, 2021, after announcing a transaction valued at approximately $625 million.

Why was Invoice2go considered mobile-first?

Its product developed around allowing small-business owners and freelancers to create invoices and manage billing from phones and tablets as well as the web. BILL explicitly described Invoice2go as a mobile-first accounts-receivable provider during the acquisition.

Is Invoice2go a complete accounting system?

It is principally an invoicing and accounts-receivable service with expenses, reports, projects, payments, and integrations. A full accounting system normally covers a wider ledger, reconciliation, liability, asset, and financial-reporting structure.

Did BILL replace Invoice2go?

No. Invoice2go continued as a distinct product and brand within BILL’s wider financial-operations business. Its acquisition FAQ described opportunities to connect complementary services rather than announcing that the Invoice2go application would disappear.

What problem does Invoice2go solve today?

It reduces the operational distance between finishing work and billing the customer. The service can connect estimates, invoices, customer details, payment status, expenses, projects, and selected integrations around the same small-business workflow.

Does Invoice2go process every payment itself?

Invoice2go presents and records supported payment options within the billing flow, while payment providers and financial institutions perform the underlying authorization, processing, settlement, and bank-posting functions.

Why would a business use Invoice2go with accounting software?

Invoice2go can remain the customer-facing billing layer while accounting software maintains the broader books. The connection can reduce duplicate entry, but the accountant may still need bank records, fees, receipts, payroll information, and transactions created outside Invoice2go.