The NRS e-invoicing mandate is well-intentioned, technically sound, and modelled on proven global frameworks. It is also genuinely challenging to implement, especially for businesses that haven’t modernized their financial operations in years.

Here are the top challenges Nigerian businesses will face with NRS e-invoicing, and how to navigate them.

Challenge 1: Legacy Systems That Can’t Generate XML Invoices

The problem: The vast majority of Nigerian SMEs and mid-market businesses use accounting tools, or no accounting tool at all, that cannot produce UBL-format XML invoices. Excel spreadsheets, Word templates, and even many legacy versions of accounting software simply cannot interface with the NRS MBS platform.

What most businesses miss: Even businesses using modern software like QuickBooks or Sage may be on versions that don’t support UBL export. The software name is not a guarantee; rather, the version and configuration matter.

The fix: Rather than replacing your entire accounting system, most businesses can resolve this by integrating with an accredited NRS service provider via API. The provider handles the XML formatting and NRS transmission layer, while your existing tools continue to manage your books. This is the path with the least disruption.

Challenge 2: Supply Chain Non-Compliance

The problem: Your compliance does not protect you from your suppliers’ non-compliance. If a supplier issues you a traditional invoice without NRS validation, you cannot claim input VAT on it regardless of whether you yourself are fully compliant.

What most businesses miss: This risk is asymmetric. Large taxpayers (already in Phase 1) are currently receiving invoices from medium and emerging taxpayers who won’t be mandated until 2026 and 2027. This creates a multi-year window where input VAT exposure is live, even for compliant businesses.

The fix: Audit your supplier network now. Identify which suppliers are large, medium, or emerging taxpayers. Engage them proactively on their compliance plans. Consider making NRS e-invoicing compliance a procurement requirement in new vendor contracts.

Challenge 3: Staff Who Don’t Know What Changed

The problem: NRS e-invoicing affects not just your finance director; it affects everyone who touches an invoice. Salespeople who raise quotes. Operations staff who log deliveries. Admin staff who process purchase orders. If they don’t understand that PDFs are no longer valid, mistakes will happen.

What most businesses miss: The risk is mostly accidental. For instance, a well-meaning staff member sends a client the wrong document. A supplier relationship is damaged because an invoice was rejected. A payment is delayed because the buyer couldn’t verify the document.

The fix: Invest in team-wide awareness training, not just a finance briefing. Make NRS e-invoicing part of your employee onboarding. Update your internal invoice approval workflows and document templates.

Challenge 4: The Cost and Complexity of Building Custom Integrations

The problem: Some businesses, particularly those with in-house technical teams, will attempt to build their own NRS integrations. This is technically possible, but it is expensive, time-consuming, and requires ongoing maintenance as the NRS system evolves.

What most businesses miss: The NRS system is still maturing. Updates, format changes, and new validation rules will be released over time. A business that builds a custom integration in 2026 is committing to maintaining and updating it for years, with an internal team that may have competing priorities.

The fix: Unless you are a very large enterprise with dedicated fintech engineering resources, partnering with an accredited service provider like Duplo is almost always the better choice. The provider maintains the integration, absorbs the regulatory changes, and keeps you compliant without ongoing engineering costs on your side.

Challenge 5: Transitioning Mid-Billing Cycle

The problem: Businesses don’t get to pause their billing operations while they implement NRS e-invoicing. The transition has to happen while your business is still running; issuing invoices, collecting payments, managing payroll, and handling supplier relationships.

What most businesses miss: This is where implementation timelines get compressed. Businesses underestimate the disruption of a mid-cycle transition and delay, which then forces a rushed, error-prone implementation just before the deadline.

The fix: Start the implementation process significantly before your go-live date. Use the NRS pilot phase to run parallel billing: traditional invoices alongside NRS e-invoices, so your team gets comfortable with the new workflow before it’s the only option.

Challenge 6: Multi-Entity and Cross-Border Complexity

The problem: Businesses that operate across multiple legal entities in Nigeria, or that have cross-border transactions, face additional complexity. Each Nigerian entity needs its own NRS registration and e-address. Cross-border transactions have their own invoicing requirements that must be reconciled with the NRS framework.

What most businesses miss: Group companies that consolidate reporting often discover that their subsidiary-level invoicing is fragmented and non-standardised. NRS e-invoicing forces a consolidation of invoicing processes that some groups are not structurally prepared for.

The fix: Conduct a group-wide invoicing audit before implementation. Map every entity, every invoice type, and every cross-border transaction pattern. Choose a service provider whose platform can handle multi-entity management under one dashboard.

Challenge 7: Archiving and Retrieval

The problem: NRS e-invoices must be archived and retrievable in human-readable format for a defined period after issuance. Many businesses don’t have structured digital archiving in place, battling with documents stored in email inboxes, local hard drives, or informal cloud folders.

What most businesses miss: The archiving requirement isn’t just about keeping files. It’s about being able to retrieve a specific invoice instantly during an audit with full data integrity. A folder of PDFs doesn’t meet this standard if the metadata has been altered or the files aren’t indexed.

The fix: Ensure your chosen e-invoicing platform has built-in archiving and retrieval functionality. Most accredited providers offer this as part of their service. If you’re building your own integration, factor structured archiving into the technical design from the start.

These challenges are real, but they’re also solvable with the right infrastructure.

Duplo Solves All of This in One Platform

Duplo removes the complexity from NRS e-invoicing.

It integrates with your existing accounting tools via API, handles the XML generation, NRS transmission, IRN retrieval, QR embedding, and archiving, all in a single unified workflow. Your team continues working as usual, while compliance happens in the background.

👉 Stay compliant without the operational burden. Get started with Duplo here.