Published 2026 | TIKC NewsWire
When you do government work, money and property flow through your hands. Advance payments, government-owned equipment, materials bought with federal funds. Here is the rule that trips people up: none of it is yours to borrow, keep, or quietly use for something else. A federal criminal law, 18 U.S.C. 641, covers stealing or converting government money and property, and it can apply even when you told yourself you would pay it back. For an honest contractor, the danger is not a grand theft. It is the small, casual misuse that you never thought of as stealing.
What the law actually covers
In plain terms, 18 U.S.C. 641 makes it a crime to steal, knowingly convert, or misuse money, property, or things of value that belong to the United States. Convert is the key word. It does not just mean taking something and running. It means using government property or funds for a purpose they were not meant for, as if they were your own. That can include spending advance payment money on unrelated bills, selling or keeping government-furnished equipment, or using federally funded materials on a private job.
The honest-mistake trap
Most contractors who get caught here were not planning a heist. They were short on cash and dipped into an advance to cover payroll. They finished a contract and kept the leftover government equipment because no one asked for it back. They used materials bought on a federal job to patch a commercial one. Each of those can be a conversion, even if you intended to make it right later. This is why managing government property carefully, and keeping advance funds separate, is not just paperwork. It keeps an honest cash-flow move from looking like theft.
Why your money has to stay in its lane
The cleanest way to stay safe is to treat government funds as restricted from the day they land. Advance and progress payment money is meant for the work it was paid for, not a rainy-day fund. Government property stays on the books until it is properly returned or disposed of. When you blur those lines, you risk not only a conversion charge but a broken accounting system that invites withholds and audits. Tracking where federal dollars and assets go protects you twice.
What to do now
- Keep funds in their lane. Spend advance and progress money only on the work it was paid for.
- Track government property. Know what government-owned equipment and material you hold and where it is.
- Return or dispose properly. Do not keep leftover government property just because no one asked.
- Never cross-use materials. Keep federally funded materials off your private or commercial jobs.
- Separate your accounts. Use accounting that keeps government money clearly apart from your own.
You would never walk out with a stapler that said property of the government on it. Treat the money and equipment the same way. Keep federal funds in their lane, give back what is not yours, and you protect your business from a charge that honest people fall into by accident. Brick by brick.
FAQ
What does 18 U.S.C. 641 cover?
It makes it a crime to steal, knowingly convert, or misuse money, property, or things of value belonging to the United States.
What does convert mean?
Using government property or funds for a purpose they were not meant for, as if they were your own, even if you did not take them and leave.
Can I be charged if I meant to pay it back?
Yes. Intending to make it right later does not necessarily save you. Using advance money for unrelated bills can still be a conversion.
How do I stay safe?
Keep government funds restricted to their contract, track and return government property, never cross-use federally funded materials, and separate government money from your own in your accounting.
Sources
18 U.S.C. 641. Public money, property or records. (2026).
Federal Acquisition Regulation. (2026). Part 45, Government Property, and Subpart 32.4, Advance Payments.
This article is general information, not legal advice.
About the Author
Melanie Patterson
Founder and CEO of Team Integrity Knowledge Center and creator of GovCon iSource. Former nurse turned entrepreneur with over 10 years guiding small, women-owned, and minority-owned businesses to over $10 million in government awards. Build, grow, scale, brick by brick. Contact
