Employee Expense Report Reimbursement 2026

Managing expense reports represents a daily challenge for all HR and finance teams: according to a 2024 study by GBTA (Global Business Travel Association), processing a single manual expense report costs an average of £52 to the company, between collecting receipts, hierarchical validation and accounting. Yet many companies still operate without formalised procedures or appropriate tools, exposing themselves to URSSAF corrections, disputes with employees and risks of internal fraud. This practical guide details the rules applicable in 2026: official thresholds, required supporting documents, validation procedures and digital tools to secure the entire chain.

Understanding the foundations of professional expense reimbursement

Legal definition and distinction from salary

Reimbursement of professional expenses is not a salary: it is the restitution to an employee of expenditure incurred in the interest of the company, during the performance of their employment contract. This distinction is fundamental: when properly qualified, these sums are exempt from social contributions (Article L. 242-1 of the Social Security Code), provided that the ceilings and supporting documents set by URSSAF are respected.

Two regimes coexist:

• Reimbursement of actual expenses: the employer reimburses expenditure actually incurred, on proof of payment.
• Fixed allowances: the employer pays fixed indemnities, presumed exempt within URSSAF thresholds. Beyond this, the excess amount is subject to contributions, unless proof is provided that the actual expenses were indeed incurred.

Scope of application: which expenses are eligible?

URSSAF distinguishes several categories of reimbursable professional expenses:

• Travel expenses: transport (train, plane, taxi, personal vehicle), accommodation, meals during business travel.
• Dual residence expenses: for employees required to maintain two homes.
• Home working expenses: fixed allowance or reimbursement of actual costs related to working from home.
• Meals at office or on site: meal allowances according to the nature of the activity.
• Long-distance travel: specific regime for journeys over 50 km from home and over 1 hour 30 minutes of travel.

Expenses described as "mixed" (professional and personal use combined) must be subject to rigorous allocation, otherwise they risk being reclassified.

URSSAF 2026 thresholds: the exemption limits to know

Mileage allowances

Mileage allowances (MA) constitute the most frequently audited item. For 2026, the tax threshold set by the Administration (published by decree in the Official Tax Bulletin) serves as the URSSAF reference. The principle: if the employer reimburses within the tax threshold, the sums are exempt from social contributions without proof of actual expenses.

By way of indication, for a vehicle of 5 CV:

• Up to 5,000 km: £0.548/km
• From 5,001 to 20,000 km: £0.309/km + £1,272
• Over 20,000 km: £0.364/km

(These figures are given as an indication based on the revised 2025 threshold; verify the official update in the Official Tax Bulletin as soon as the 2026 decree is published.)

The employee must keep a travel log detailing the date, the route from origin to destination, the business purpose and the distance travelled. Without this log, URSSAF may reclassify the MA as a benefit in kind.

Meal allowances

For 2026, the exemption thresholds for meal allowances are set as follows (decree of 26 May 2020, revalued annually):

| Situation | Exempt threshold 2026 | |---|---| | Meals on business travel away from home > 3 hours | £10.10 | | Restaurant on work premises (no canteen) | £7.40 | | Long-distance travel – meals | £20.20 | | Long-distance travel – accommodation + breakfast (Paris, Hauts-de-Seine, Seine-Saint-Denis, Val-de-Marne) | £75.20 | | Long-distance travel – accommodation + breakfast (other municipalities) | £55.10 |

Home working expenses

Since the health crisis and the generalisation of hybrid working, URSSAF has clarified the regime for home working expenses. In 2026, the fixed allowance is exempt up to £2.70 per home working day, limited to £59.40/month. The employer can exceed this threshold by reimbursing justified actual expenses (internet subscription, electricity, etc.), but must then retain the corresponding supporting documents.

Mandatory supporting documents: what the company must require

Minimum documents to collect

Lack of supporting documents is the leading cause of URSSAF correction during audit. For each expense report, the employee must provide:

1. The original invoice or receipt (or digitised with probative value) showing the date, gross amount, VAT recoverable and the service provider.
2. The business purpose: object of the journey, names of participants at a business meal, relevant project.
3. The mileage log for MA (see above).
4. The travel order or any internal document attesting that the journey was indeed planned within the scope of professional activity.

Since the decree of 22 March 2017 relating to the rules for keeping accounting documents, digitised supporting documents have the same probative value as original paper documents, provided that reliable digitisation standards are respected (integrity, legibility, timestamping). Electronic signature for HR allows a certified signature to be affixed to digitised expense report forms, strengthening their enforceability in case of audit.

Retention period

Supporting documents for professional expenses must be kept for:

• 3 years under the Labour Code (prescription of salary payment claims).
• 3 years under URSSAF audit rights (Article R. 243-59 Social Security Code).
• 10 years under the Commercial Code for accounting documents.

In practice, prudence recommends retention of 10 years for any document with an accounting dimension.

The particular case of digitised expense reports

The rise of digital expense management tools requires companies to verify that their solution complies with the conditions for archiving with probative value defined by the ACPR and the Tax Administration. A digitised document without integrity guarantees (hash, qualified timestamping, electronic signature) can be rejected during an audit. Reliable digitisation now relies on electronic signature technologies compliant with the eIDAS regulation.

Reimbursement procedure: structuring the internal process

Defining a written expense policy

Any company with more than 10 employees has an interest in formalising a professional expense policy (often called a Travel & Expense Policy). This document must specify:

• The categories of reimbursable expenses and the applicable thresholds by role.
• The maximum deadline for submitting expense reports (generally 30 to 60 days).
• The list of required supporting documents by category.
• The validation circuit (line manager, Finance Director, accounting).
• Payment methods (transfer, salary integration).
• Penalties for fraud or non-compliance with rules.

This policy should be integrated into the internal regulations or be the subject of a memorandum distributed to all employees, and ideally signed electronically to attest to their acknowledgement of receipt.

The validation circuit in 4 steps

Step 1 – Submission by employee: the employee completes their expense report form (paper or digital), attaches supporting documents and indicates the reason for each expense.

Step 2 – Management validation: the line manager verifies compliance of expenses with the expense policy and the reality of the business travel. They approve or refuse, providing reasons for any rejection.

Step 3 – Accounting/HR check: the accounting or HR department verifies the consistency of amounts, application of URSSAF thresholds and completeness of supporting documents.

Step 4 – Payment: reimbursement is made, ideally integrated into the payslip or via a separate traceable transfer. If integrated into the payslip, the reimbursed amounts must appear on the payslip with the note "expense reimbursement – not subject to contributions".

Automation and digital tools

SaaS expense management solutions (Spendesk, Jenji, Expensya, etc.) can reduce administrative processing time by 60 to 75 % (source: Forrester 2023 report on digitalisation of financial processes). Combined with an electronic signature solution for the company, they enable:

• Capturing receipts in real time via smartphone.
• Auto-completing forms by OCR.
• Automating compliance checks (thresholds, categories).
• Electronic validation of each step with timestamped traceability.
• Automatic archiving of documents with probative value.

Preventing risks: fraud, correction and disputes

The most frequent frauds

According to a study by the ACFE (Association of Certified Fraud Examiners, 2024 report), expense reports account for 14 % of internal fraud cases in companies. Recurring patterns:

• Inflating amounts: modifying receipts or submitting receipts that do not correspond to actual expenses.
• Multiple submission: the same document submitted several times.
• Personal expenses disguised: private spending presented as professional.
• Manager-employee collusion: validation of fictitious expenses between related parties.

Implementing multi-level validation, random in-depth checks and anomaly detection tools (AI for receipt/expense matching) significantly reduces these risks.

URSSAF correction: watchpoints

During an URSSAF audit, inspectors examine as a priority:

1. Consistency of MA: declared mileage vs. actual distances, vehicle used vs. owner.
2. Representation expenses: thresholds exceeded, lack of list of participants at business meals.
3. Client gifts: subject to contributions beyond £69 per beneficiary per year (2026 threshold).
4. Standing advances: an unrepaid advance can be reclassified as salary.
5. Double taxation: expenses reimbursed AND included in the basis for calculating contributions.

In case of correction, the company is liable for employer AND employee contributions on the reclassified sums, increased by penalties that can reach 10 % of the corrected amount (Article R. 243-18 Social Security Code), or 25 % in case of proven concealment of employment.

Disputes with employees

Refusing to reimburse a legitimate professional expense exposes the employer to legal proceedings before the employment tribunal. The Court of Cassation regularly reminds (Cass. Soc., 25 Sept. 2019, No. 17-31.171) that the employer cannot charge the employee with expenses incurred in the interest of the company. A clear, distributed and signed expense policy provides the best protection against such disputes. You can facilitate this distribution using Certyneo's AI contract generator to quickly formalise your internal policies.

Legal framework applicable to professional expense reports

The regulation governing the reimbursement of expense reports in the United Kingdom articulates several legal frameworks that must be understood simultaneously.

Employment Law: The fundamental principle established by UK employment law requires that employers must reimburse employees for expenses properly incurred in the course of their employment. The treatment of such reimbursements for tax and National Insurance purposes is governed by HMRC guidance and legislation relating to deductible expenses and allowable benefits.

Income Tax (Earnings and Pensions) Act 2003: Section 365 and related provisions establish the rules for deduction of employee expenses and the conditions under which reimbursements are exempt from income tax. The Approved Mileage Allowance Relief (AMAR) sets the tax relief available for mileage incurred in business use of a personal vehicle.

National Insurance Contributions: Reimbursement of expenses that qualify as deductible business expenses under the legislation will not be subject to National Insurance contributions, provided the proper conditions are met and documentation is retained.

Data Protection Act 2018 and UK GDPR: Personal data collected in the context of expense reports (employee identity, travel, modes of transport, meals) constitutes personal data subject to UK data protection law. The employer, as data controller, must define a proportionate retention period, secure storage and enable the exercise of individuals' rights (access, rectification, erasure after the legal retention obligation).

Companies House and accounting standards: Expense records must be retained in accordance with accounting record requirements (typically 6 years for UK limited companies).

Usage scenarios: managing expense reports in practice

Scenario 1 – An SME of professional services with 80 itinerant employees

An SME of management consultants with around eighty consultants, most of whom travel to client sites several days per week, processed up to 400 expense reports per month via Excel spreadsheets and scanned paper receipts sent by email. The average reimbursement time was 45 days, a source of recurring team dissatisfaction.

By deploying a digitised process incorporating an electronically signed expense report form at each validation step (consultant → manager → CFO), the company reduced reimbursement time to 11 days on average, a reduction of 75 %. The rate of incomplete files submitted to accounting fell from 38 % to less than 4 %, thanks to automatic URSSAF threshold checks built into the form. During the subsequent URSSAF audit, all supporting documents were able to be produced in less than 2 hours, compared with several days previously.

Scenario 2 – A healthcare establishment group of approximately 1,200 agents

An intermediate-sized hospital group managed reimbursements of travel expenses for healthcare and administrative staff required to travel between multiple sites. The multiplicity of statuses (civil servants, contractors, hospital practitioners) made management complex, with three distinct threshold frameworks.

Adoption of a unified expense policy, accompanied by a digital validation workflow with qualified electronic signature for travel orders, made it possible to reduce errors in expense classification by 52 % over one year. Timestamped traceability of validations also eliminated disputes relating to reimbursements claimed to have been approved but not traced. Direct integration with the HR information system reduced the accounting data entry burden by the equivalent of 0.4 FTE per year.

Scenario 3 – A franchise network of 35 outlets

A specialised distribution network of franchise locations had to manage expense reports for regional managers and network coordinators based throughout the country. The absence of a formalised policy led to significant disparities in practices between regions and regular overruns of URSSAF exemption thresholds, creating risks of correction.

After formalising an expense charter and rolling out a mobile submission tool with two-level electronic validation, the URSSAF compliance rate (expenses within thresholds or supported by actual expense documentation) rose from 71 % to 97 %. The cost of processing per expense report fell by 48 %, from an internal estimate of £38 to less than £20 per file. Management was able to produce a consolidated monthly report by region, previously impossible, facilitating control of travel costs.

Conclusion

Good management of expense reports and employee reimbursement rests on three inseparable pillars: precise knowledge of 2026 URSSAF thresholds, a formalised and communicated internal policy, and a validated process guaranteeing traceability of supporting documents. At a time when digitisation is both a legal requirement and a productivity lever, companies that rely on certified electronic signature workflows simultaneously reduce their correction risks, reimbursement delays and administrative burden.

Certyneo enables you to digitise your entire HR process — from expense report forms to internal policies — with eIDAS-compliant electronic signatures, timestamped and automatically archived. Discover our HR solutions or calculate your ROI today.