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Across hundreds of ERPEnterprise resource planning (ERP) is a type of software that organisations use to manage main business processes. systems reviewed by Innovate Tax, one common thread keeps surfacing: manual tax logic is still prevalent everywhere. Hard-coded rules, spreadsheet-based workarounds, override dependencies, and tax condition sets that haven’t been touched since go-live.
On the surface, it works. The tax is calculated, the invoice is sent out, and the month closes. However, scratch beneath the surface, and this approach is riddled with risk, inefficiency, and high costs.
1. Manual logic doesn’t scale
Manual tax setups might hold up when a business operates in one or two tax jurisdictions, but as soon as that expands, the cracks start to show. Adding new rules, rates, or exemptions means:
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Opening change requests to IT
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Risking unintended consequences in live systems
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Relying on individuals who “know how it’s set up”
This introduces delays, errors, and a growing dependency on tribal knowledge. That’s not a long-term strategy – it’s a liability.
2. New regulations break old workarounds
Whether it’s ViDAViDA or 'VAT in the Digital Age', is an EU initiative proposed by the European Commission that seeks to modernise and harmonise VAT processes for member states, by embracing new technologies. It is aimed at updating processes for the management of VAT, and reduce the VAT gap and fraud. The proposal also aims to address challenges in the area of VAT raised by the development of the platform economy. in the EU, Brazil’s VAT reform, or any number of e-invoicingElectronic invoicing - widely referred to as e-invoicing - is the exchange of a digital document between a supplier and a buyer. E-invoices are issued, transmitted and received in a structured data format that enabled automatic and electronic processing. They contain data in a machine-readable format so that an AP system can read an invoice without manual data entry, leading to faster and more efficient invoicing. and digital mandates worldwide, modern tax compliance demands:
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Real-time decision-making
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Audit trail generation
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Consistent tax treatment across entities
Manually maintained logic simply can’t keep up. A spreadsheet doesn’t produce a digital audit trail. A custom condition set written five years ago won’t dynamically update for new reporting requirements.
3. You don’t know what you don’t know
The real risk of manual logic is what’s hidden. We’ve seen ERP systems where:
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Thousands of tax codes exist with no clear documentation
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Logic clashes silently override correct calculations
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Rates are out of date but never flagged
Without an automated, centralised, and reviewed setup, errors go unnoticed. Until an audit – or worse – surfaces them.
4. Automation isn’t about replacing people, it’s about replacing risk
Shifting from manual tax configuration to automated, rule-based tax engines or reviewed logic isn’t about removing control from tax teams. It’s about giving them better visibility, greater accuracy, and freedom from firefighting.
When your ERP is appropriately configured, tax teams spend less time chasing problems and more time delivering insight.
What you can do now
You don’t need to overhaul your ERP overnight. But you do need to understand where you stand. Our Solution Review service will audit your existing setup, flag risks, and recommend improvements, whether you’re planning for ViDA, global growth, or just reducing reliance on key individuals.
Because in 2025, there’s a better way than “we’ve always done it like this.”
