Nearly €1 Billion Wasted on Pay Software for Soldiers, Reports Say It Paid Absurd Sums Before Being Abandoned

October 10, 2026

A non-commissioned officer discovers on his tax return that he officially earned 350,000 euros in a year. Families of soldiers deployed on external missions find themselves under banking restriction, because no salary has been paid. This is the tally of Louvois, the software meant to modernize the payment of salaries across the entire French armed forces, which ended up costing nearly a billion euros, amid cascading errors, patchwork budgeting, and a forced replacement.

À retenir

  • A software launched in 1996 to unify military payroll, but delivered “shaky” in 2011 after 15 years of delays
  • Massive anomalies: overpayments of 465 million euros in 2012 alone, soldiers paid outrageous sums or not paid at all
  • Ten years of fiasco before abandonment in 2013, followed by a total cost approaching a billion with the replacement

A Project Launched in 1996, Delivered Shaky in 2011

Louvois, the sole inter-service payroll software, was a project initiated in 1996 by the Ministry of Defense to unify the remuneration calculations for military personnel across all French armed forces: the Army, the Air Force, the Navy, health services, and even the National Gendarmerie. The ambition was legitimate: to replace a mosaic of disparate systems with a single tool. Fifteen years and several pushbacks later, the result was catastrophic.

Its development was marked by multiple failures, follow-ups, and strategic pivots between 2001 and 2011. The software finally entered service in April 2011, initially only for personnel of the Armed Forces Health Service. The project’s first attempt had already failed by December 2003, before the software was ready to settle the soldiers’ salaries. A warning signal ignored, or nearly so.

The project name itself was richly ironic. It was named “Louvois” in homage to François-Michel Le Tellier, Marquis of Louvois, the War Minister under Louis XIV, who made the French army the most modern in Europe and instituted direct payment of soldiers’ salaries. The tribute turned into a curse.

Payments Made at Random, Families Left Homeless

An internal audit in 2010 already found that “Louvois proved to be brittle, difficult to maintain, and hard to exploit.” Yet no one shut the machine down. The software was rolled out to all of the Army in October 2011, and the bugs exploded at an industrial scale.

The launch was riddled with numerous problems: underpayments, overpayments, soldiers not paid automatically. Soldiers of all ranks experienced payment delays and even had to take out consumer loans to feed their families or cover the costs of their postings. For a non-commissioned officer deployed to Mali or the Central African Republic, learning by phone that his account is overdrawn because Louvois failed to calculate his OPEX bonus is more than a technical issue. It is a betrayal.

France’s Court of Auditors put the 2012 calculation errors at 465 million euros. In a single year. In one year, more than 60,000 service members reportedly received an overpayment, totaling 106 million euros. Some were asked to reimburse the sums months later, without any explanation of how the figure had been calculated.

A testimony collected by France 24 at the time sums it up: “You know, I know of a family where a non-commissioned officer saw on his tax return that he earned 350,000 euros a year! It’s exhausting, it’s been going on for years, and nothing has been put right.” By mid-November 2015, the total amount of overpayments for the Army and the Navy reached 358 million euros since 2011, of which only 171 million had already been recovered.

Abandoned, Replaced, and the Bill Keeps on Mounting

After two years of fiasco, Defense Minister Jean-Yves Le Drian publicly admitted in November 2013: “I have decided to abandon the Louvois system. It is a device that was implemented in a hurry and led to extremely painful situations.” He might have added: “and extraordinarily costly.”

The direct cost of the project—outsourcing, personnel, and the functioning of project-management structures—is estimated at 80 million euros by the Court of Accounts. But that figure does not tell the whole story. Le Figaro reported that the bill rose to 470 million euros, between the purchase price and the costs of Louvois’ dysfunctions, not counting the replacement or compensation to Steria and its subcontractors.

One must also add the cost of the successor. The nearly 130-million-euro contract for the new software “Source Solde” covered development, deployment, and maintenance—corrective and evolutive—for ten years. Trusted to Sopra Steria, the same industrial family as Steria, already involved in Louvois, this project also suffered delays. It is only since January 1, 2021 that all 250,000 military personnel have been paid by Source Solde, two years behind the initial schedule.

The failure of the Louvois project illustrates the difficulty of designing large-scale information technology programs that must integrate the complexity of public administration and the armed forces. Any payroll software for military personnel must account for no fewer than 180 different allowances and indemnities, “which was not done to make Louvois’ task easier.” This technical explanation is real. It does not excuse ten years of neglect in project management.

A Distinctly French Symptom

Louvois was not an isolated accident. After Louvois was abandoned in 2013, the ONP, the National Payroll Operator, was shelved in turn. Launched in May 2007, this supercomputer was intended to develop a single payroll information system for more than 2.4 million state employees. The bill rose between 235 and 290 million euros for this project, which joined its military counterpart Louvois in the tomb of France’s large modernization projects.

The comparison with abroad is telling. In the United States, the integrated payroll and HR project for all military branches, launched in 2001 on Oracle’s PeopleSoft, cost a staggering one billion dollars and was abandoned in 2010 after malfunctions strangely similar to those of Louvois. The Pentagon decided to return to its home-grown software, a COBOL-based system aged about forty years. When a bug hits a billion, copying it onto an old floppy becomes a strategic decision.

Florence Parly, Minister of the Armed Forces in 2021, summed up the decade in a single sober line: “We are turning the page together on a painful decade for the entire ministry and for the tens of thousands of soldiers and their families who bore its failures.” What is less sober is the method that allowed this disaster to last so long: instead of advancing in stages, the reform sought to change everything at once, generating more problems than it solved. A typical reflex of large state projects, where the ambition of total disruption drowns out prudent iteration. The successor Source Solde, by contrast, was managed like a weapons program, with a tripartite governance between the staff, the General Directorate of Armaments, and the General Secretariat, and it works. The lesson came at a high price.

Sindre Halvorsen

I write about space exploration, frontier science and the technologies that are quietly shaping the future. From Norway, I follow the missions, discoveries and ideas that connect life on Earth with what lies beyond it. My goal is to make complex subjects clear, useful and worth paying attention to.