InvoiceNow and the future of indirect tax compliance

From paper to real‑time tax

Where we started – paper and retrospective compliance

Not long ago, indirect tax compliance was built around paper invoices, manual accounting records, and periodic reporting. Organisations relied on manual invoice checks, spreadsheet reconciliations, and post‑period adjustments. To date, tax authorities generally validate compliance through after‑the‑fact (sometimes years after..) audits, meaning errors could remain hidden until long after transactions occurred.

Where we are now – digital invoices and partial automation

Over time, businesses moved to digital records (think email and PDF invoices) and increasingly to cloud‑based accounting and ERP systems. This shift brought meaningful productivity gains: invoices could be generated and processed more efficiently, accounting entries could be automated, and Goods & Services Tax (GST) returns could be prepared more quickly and consistently. However, the overall compliance model remained largely the same: tax data still flowed to tax authorities via GST returns in consolidated numbers at set intervals, often after internal review and manual clean‑up.

Where we are heading – structured e‑invoicing, direct submission, and continuous controls

We are now entering a new phase of indirect tax compliance transformation. Globally, tax administrations are moving toward structured transaction‑level data, supported by analytics, continuous transaction controls, and in some cases near real‑time reporting. Singapore’s GST requirements under InvoiceNow aligns with this trend by enabling direct transmission of invoice data from business systems to the Inland Revenue Authority of Singapore (IRAS) through the InvoiceNow network.

Singapore lens: Why InvoiceNow matters and why it is different

Singapore’s approach is notable for two reasons:

1. Integration into business systems: The policy direction is to integrate indirect tax compliance into the systems used to run the business – billing, accounts receivable or accounts payable, and finance workflows – rather than relying solely on post‑period reporting.
2. A platform for value‑added compliance services: As adoption increases, the ecosystem enables automated checks (e.g. validations and alerts) and the potential for pre‑filing assistance and “health checks” that reduce compliance effort over time.

Impact of transformation on IRAS and tax administrations 

For IRAS and tax administrations globally, the shift to structured, transaction‑level data changes how the tax system operates.

What tax administrations gain

• Better timeliness and accuracy of tax collection: Structured invoice data enables earlier visibility of transaction activity and more consistent validations.
• Stronger risk analytics: Data enables earlier detection of anomalies and targeted interventions, reducing reliance on broad, retrospective audits. We only have to look back a couple of weeks to a recent case where IRAS audits identified fraudulent invoices records by taxpayers.
• A pathway to lower friction for compliant taxpayers: Over time, better analytics can translate into fewer audits for lower‑risk taxpayers, faster resolution for those selected, and improved handling of refunds where appropriate.
• System resilience for modern commerce: Continuous, data‑driven administration is better suited to digital business models, high transaction volumes, and complex supply chains.

The broader point is this: tax administrations are modernising for a world where data is available earlier, in a standardised format, and can be analysed at scale.

Impact of transformation on companies

For businesses, InvoiceNow is more than a technology uplift – it affects systems, data, processes, people, and governance.

Systems and architecture

Companies will need to decide whether to adopt an InvoiceNow‑ready solution, integrate existing finance/ERP systems via an access point, or implement a hybrid approach. The right answer often depends on billing complexity, transaction volumes, the number of systems in play, and whether the organisation is already on a finance transformation journey.

Data quality and GST logic

As compliance becomes more automated, the ability to “fix it at return time” diminishes. Incorrect master data, inconsistent invoice fields, manual workarounds, or uncertain GST treatments that previously surfaced late may become visible earlier and require faster resolution.

Processes and controls

Companies should expect stronger emphasis on:

• Invoice issuance controls and approvals
• Credit note and adjustment handling
• Exception management (e.g., cancellations, disputed invoices, corrections)
• Governance over overrides and manual entries

Operating model and skills

Tax and Finance functions will continue to shift away from manual compilation toward oversight, analysis, and exception management. Success depends on closer collaboration across tax, finance, IT, and operations.

Programme risk 

Implementation is rarely “plug and play”. Even where technology is readily available, implementation can be prolonged for organisations with multiple entities, complex invoicing flows, legacy ERPs, or decentralised billing processes.

Preparing for InvoiceNow

InvoiceNow: A practical roadmap of what businesses should be doing

Read the article