Use case · Finance control
Check every provider invoice against the contract before payment.
Finance teams work from a simple review interface. Nexus pulls the contract and source data, runs every calculation, flags discrepancies and keeps the process auditable.
- Purpose-built finance interface
- Deterministic checks
- Exception-led review
- Auditable workflow
The operational problem
Contract terms are complex, and invoices are checked by hand.
Content, platform and service providers invoice on revenue share, tiers, bonuses and deductions that differ by market, product and period. Checking each invoice means rebuilding the calculation manually.
Terms live elsewhere
Rates, tiers, caps and adjustments sit in contracts and amendments, not next to the invoice being reviewed.
Repetitive calculations
Analysts recalculate tax, deductions and revenue share in spreadsheets for every invoice, every period.
Late discrepancies
Differences between declared and actual figures are found after payment, if they are found at all.
Scattered evidence
Manual inputs, assumptions and approvals are spread across email and files rather than one record.
Built for the business. Powered by Nexus.
The business works in its own interface. Nexus runs underneath.
The people doing the work never open a workflow builder. They use an interface designed for their role, and Nexus handles integrations, rules, code, AI where useful, exceptions, approvals and audit.
Built for the business
Purpose-built interface
- Invoice queue by provider, market and period
- Approved or Flagged outcome with the reason
- Variance and checks passed or blocked
- Analyst review and structured input
Powered by Nexus
Orchestration engine
- Document ingestion from email, shared storage or connected sources
- Contract retrieval at run time
- Deterministic tax, adjustment and rate checks
- Discrepancy analysis, approvals and audit
Workflow
From invoice to verdict
Ten governed steps, each recorded. When data is missing the workflow pauses for the analyst instead of guessing.
- 01
Receive
The invoice and supporting documents arrive by email, shared storage or a connected source. In this implementation, examples include PDF, XLSX and XML files.
- 02
Retrieve contract
Active contract terms are retrieved for the provider, market, product and period.
- 03
Compare revenue
Declared revenue is compared with source or internal data where it is available.
- 04
Recalculate tax
Tax is recalculated according to the configured rules for the market.
- 05
Check adjustments
Bonuses, deductions, caps and other contract-defined adjustments are checked.
- 06
Check arithmetic
Net arithmetic on the invoice is verified.
- 07
Apply rate logic
The correct revenue-share, tier or rate logic from the contract is applied.
- 08
Verdict
The calculated obligation is compared with the invoiced amount and the invoice is marked Approved or Flagged with the reason.
- 09
Pause for input
If supporting data is missing, the workflow asks the analyst for the specific structured input, then resumes.
- 10
Audit
Manual input, decisions and the outcome are recorded in the audit trail.
Business interface
What finance sees
A custom finance and accounts payable interface. It is not the Nexus workflow builder; analysts review outcomes and supply input while Nexus runs the logic underneath.
Approved
Checks passed
Flagged
Needs review
Waiting
Input requested
Paid
Posted to AP
Invoice queue
| Provider | Market / period | Status | Variance / reason |
|---|---|---|---|
| Provider A | Market 1 · Period 1 | Approved | Within tolerance |
| Provider B | Market 2 · Period 1 | Flagged | Rate tier mismatch |
| Provider C | Market 1 · Period 1 | Waiting | Source data missing |
| Provider D | Market 3 · Period 1 | Flagged | Deduction cap exceeded |
Checks for Provider B
- Contract terms
- Retrieved, active version
- Tax recalculation
- Passed
- Adjustments
- Passed
- Rate logic
- Blocked: tier mismatch
Architecture
Three layers, one governed process.
The interface, the orchestration and the systems of record stay separate. Each keeps its own responsibility.
Purpose-built finance interface
Invoice review UI
- Approval status
- Invoice queue
- Variance analysis
- Exceptions
- Review / approve / resolve
Nexus orchestration layer
- 01Document ingestion
- 02Contract retrieval
- 03Deterministic checks
- 04Discrepancy analysis
- 05Human approval
- 06Audit
Systems · Data in
- Invoices & supporting documents
- Contract database
- Revenue / source data
- Reference data
Systems · Data out
- ERP / AP systems
- Alerts / notifications
- Archive / reporting
Why Nexus
Why Nexus fits finance control workflows
Deterministic checks
Tax, adjustments, arithmetic and rate logic run as explicit rules, so every verdict can be traced to the terms and data it used.
Human approval before payment
Flagged invoices and any override pass a named approval step. AI can help extract or classify documents; it does not decide whether an invoice is paid.
Contract logic as governed workflow
Market, product and period variations are represented in versioned workflow logic rather than personal spreadsheets.
One audit trail
Documents, contract versions, manual inputs, decisions and outcomes are recorded together.
Runs where you need it
Nexus deploys in your own cloud, on premises or air-gapped, so invoice and contract data stay in your environment.
Practical outcomes
What changes for the team.
- Analysts focus on exceptions instead of repetitive calculations.
- Contract terms are applied consistently across providers and periods.
- Discrepancies are surfaced before approval.
- Manual input is captured in the same audit trail.
- Contract and market changes can be represented in governed workflow logic.
FAQ
Questions about this use case
Does AI decide whether an invoice should be paid?
No. Checks run on deterministic rules that return Approved or Flagged with a reason, and payment decisions on flagged invoices rest with a human approver. AI can assist with reading or classifying documents.
What happens when supporting data is missing?
The workflow pauses and asks the analyst for the specific structured input it needs, then resumes. The input and who provided it are recorded in the audit trail.
Can contract terms be retrieved at run time?
Yes. The workflow retrieves the active terms for the provider, market, product and period from the contract source each time it runs.
Can different markets use different tax or rate logic?
Yes. Tax rules and revenue-share, tier or rate logic are configured per market, product or period and applied deterministically.
Where does invoice data run?
Nexus runs in your own cloud, on premises or in an air-gapped environment, so invoices, contracts and evidence stay inside the environment you choose.
Can the workflow record manual analyst input?
Yes. Manual inputs, decisions and outcomes are recorded in the same audit trail as the automated checks.
Related customer story
Supplier invoice reconciliation for a betting & gaming operator
A dedicated finance review interface with deterministic verification, human decisions and traceable document evidence.
Read the customer storyArchitecture session
Map your contract-based reconciliation.
Tell us how contracts, invoices and source data reach finance today. We will sketch the review interface, checks and approval points with you.