National tax agency: citizen response time cut from 28 days to 2
A European national tax agency deployed xyner across citizen correspondence and case servicing — 28-day response times compressed to 2 days, with FOI-grade explainability on every decision.
What the customer was up against.
A national tax agency serving 9 million taxpayers in four official languages had a 28-business-day citizen-correspondence response target it routinely missed. Refund processing for routine cases averaged 6 weeks; appeals were sitting in queues for months. Citizens were filing complaints with the parliamentary ombudsman at an accelerating rate.
What xyner built.
Deployed xyner inside the country's sovereign-cloud boundary with specialist agents for correspondence triage, case servicing, refund processing and appeal pre-screening — every decision grounded in the relevant statute, every response auditable for parliamentary and ombudsman review.
Measured impact.
Correspondence response time compressed from 28 days to 2 days on agent-handled cases; routine refund processing cut from 6 weeks to 5 days; appeal pre-screening cut backlog by 70%; ombudsman complaints down materially.
At a glance.
Situation
A national tax agency serving 9 million taxpayers in four official languages had a 28-business-day citizen-correspondence response target it routinely missed. Refund processing for routine cases averaged 6 weeks; appeals were sitting in queues for months. Citizens were filing complaints with the parliamentary ombudsman at an accelerating rate.
Intervention
Deployed xyner inside the country's sovereign-cloud boundary with specialist agents for correspondence triage, case servicing, refund processing and appeal pre-screening — every decision grounded in the relevant statute, every response auditable for parliamentary and ombudsman review.
Outcome
Correspondence response time compressed from 28 days to 2 days on agent-handled cases; routine refund processing cut from 6 weeks to 5 days; appeal pre-screening cut backlog by 70%; ombudsman complaints down materially.
Public sector · Tax administration
A European national tax and revenue agency
European Union member state
Citizen correspondence, case servicing, refund processing, appeal pre-screening
16 weeks pilot, 14 months phased rollout
From contract signature to full rollout.
What the deployment actually looks like.
The deployment runs fully inside the country's sovereign-cloud boundary, with execution, storage and model inference all region-pinned. The control plane and data plane both live in the national cloud; cross-border data movement is structurally impossible.
Correspondence Triage Agent
Reads incoming citizen letters and emails in four official languages; classifies by topic, urgency and complexity; routes to the right caseworker or to the autonomous response path.
Case Servicing Agent
Handles routine case servicing — status updates, document acknowledgement, simple substantive questions — within statute and case context.
Refund Processing Agent
For routine refund cases (single-employer, simple income, no flags), runs the full processing flow autonomously within strict thresholds.
Appeal Pre-Screening Agent
Pre-screens incoming appeals for completeness, jurisdiction and prima facie merit; assembles the casefile for the appeals officer.
Statute-aware RAG
Every decision cites the relevant tax statute, regulation or guidance; the retrieval layer indexes the national tax code in all four official languages.
Parliamentary-grade audit
Every decision captured to a tamper-evident audit log accessible to the parliamentary ombudsman and the supreme audit institution.
How the rollout sequenced.
The deployment followed the country's formal government-AI procurement and accountability process, including a parliamentary committee briefing before go-live.
Procurement & accountability review
Complete national-cloud sovereignty audit; brief parliamentary digital-government committee; obtain formal AI-deployment authorisation.
Foundations
Deploy data plane and control plane in sovereign cloud; integrate national identity provider; deploy in-country model endpoints licensed for government use.
Agent configuration
Configure four agents; load tax code, guidance and case-history into statute-aware RAG in four languages; complete first equity and language-fairness testing.
Pilot live
Live for correspondence triage and routine case servicing only, with caseworker review of every autonomous response; metrics reviewed weekly.
Refund processing rollout
Routine refund processing live; autonomy thresholds calibrated; quarterly equity review by oversight committee.
Appeals pre-screening + full coverage
Appeals pre-screening live; full operational coverage achieved; oversight reviews ongoing.
How the deployment is governed.
Tax administration carries unique governance: due process, equal treatment, statutory authority, appellate rights, parliamentary oversight, supreme audit institution review.
Sovereign-pinned execution
All execution, storage and model inference pinned to the national cloud. No cross-border data movement. Audited by the national cybersecurity authority.
Statute-grounded decisions
Every determination cites the relevant statute, regulation or guidance. Decisions cannot be made on grounds not traceable to statutory authority.
Equity & language fairness
Decisions and response quality tested for parity across language, region and demographic attributes; results reviewed quarterly by the agency's equity committee.
Due-process preservation
Citizens retain full appellate rights; adverse determinations always include the relevant statutory basis and the appeal pathway.
Parliamentary oversight
The parliamentary committee receives quarterly briefings on platform behaviour, outcomes and any incidents; the platform's audit trail is accessible to oversight bodies.
Three transferable lessons.
Three lessons for other public-sector entities deploying agentic AI for citizen-facing workflows.
Brief oversight bodies before go-live, not after
The parliamentary committee briefing in week 5 turned potential adversaries into design partners. By the time the platform went live, the committee already understood the architecture.
Multi-language is a first-class concern, not an afterthought
Treating the four official languages as equal first-class concerns from week one prevented the typical pattern of one language being well-served and others lagging.
Statute-grounded reasoning changed the citizen experience
Citizens accepted decisions they didn't like when the decision cited the exact statutory basis. The conversation shifted from 'arbitrary government decision' to 'documented statutory application'.
Could the same outcome work in your environment?
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