Debris mitigation
The FCC 5-year rule vs ESA Zero Debris vs the legacy 25-year guideline
Three deorbit regimes govern how fast a satellite must leave orbit after its mission ends. Here is how they compare - scope, deadlines, casualty limits - and what each one demands of a low Earth orbit (LEO) filing.
regulatory summary as of mid-2026 - a screening reference, not legal advice. verify against the current text of each rule before filing.
For two decades, post-mission disposal (PMD) meant one number: 25 years. That era is over. The United States Federal Communications Commission (FCC) now requires LEO spacecraft to be disposed of within five years of end of mission and enforces it at the license-application stage, and the European Space Agency (ESA) matches the under-5-year bar with its Zero Debris standard. Many disposal orbits that were fine under 25 years now fail. This page summarizes the three regimes side by side; the satellite deorbit compliance calculator runs your actual post-mission disposal plan against whichever one applies.
The three regimes at a glance
| Criterion | FCC 5-year rule | ESA Zero Debris | Legacy 25-year guideline |
|---|---|---|---|
| Authority | US Federal Communications Commission - Report & Order FCC-22-74, codified at 47 CFR 25.283 | European Space Agency - Zero Debris Approach / ESSB-ST-U-007 Space Debris Mitigation Requirements | Inter-Agency Space Debris Coordination Committee (IADC-02-01, rev. 2007) and NASA-STD-8719.14 |
| Scope / applicability | Spacecraft ending their mission in or passing through LEO (below 2,000 km) under FCC licensing - including non-US systems seeking US market access | ESA missions under the Zero Debris Approach; the Zero Debris Charter extends the ambition to its signatories | Historical international guideline for LEO clearance; retained for comparison and grandfathered missions |
| Post-mission lifetime limit | Disposal as soon as practicable, and no more than 5 years after end of mission | Under 5 years post-mission, plus a 90% disposal-success-probability requirement | 25 years after end of mission |
| Casualty-risk requirement | Reentry casualty risk below 1 in 10,000 - the threshold shared across FCC / NASA / ESA practice | The same 1-in-10,000 reentry-casualty threshold | The 1-in-10,000 limit via ODMSP / NASA-STD-8719.14 (the casualty cap predates the 5-year tightening) |
| Effective dates | Adopted September 2022; mandatory for applications filed on or after September 29, 2024 | Requirements adopted November 2023; the Charter targets no new debris generation by 2030 | IADC guidelines 2002 (revised 2007); superseded as the design requirement for new filings |
| What it means for a LEO CubeSat filing | Demonstrate a ≤5-year post-mission disposal in the orbital-debris mitigation plan before license grant - a decay analysis that does not close is an application risk | Show <5-year clearance and back the disposal method against credible failure cases (drag sails need independent deployment triggers) | A 25-year analysis alone no longer supports a new FCC or ESA filing - designing to it plans for a regulatory environment that no longer exists |
The FCC 5-year rule
In September 2022 the FCC adopted its orbital-debris update - Mitigation of Orbital Debris in the New Space Age, Report & Order FCC-22-74 - replacing the legacy 25-year post-mission disposal guideline with a hard requirement: spacecraft ending their mission in or passing through LEO (below 2,000 km) must complete disposal as soon as practicable, and no more than 5 years after end of mission. The rule became mandatory for license applications (and US market-access grants for non-US systems) filed on or after September 29, 2024 - every new application is under it now.
Three properties deserve attention. It applies at the application stage - compliance is demonstrated in the orbital-debris mitigation plan before license grant, so a decay analysis that does not close is a denial or deficiency-letter risk, not a post-mission fine. The clock starts at end of mission, not end of life - a 3-year mission whose natural decay takes 15 more years is non-compliant even though the hardware works fine. And it reaches non-US operators: any system seeking US market access through the FCC is in scope regardless of flag.
ESA Zero Debris
ESA moved in the same direction, harder. Its 2023 Space Debris Mitigation Requirements (ESSB-ST-U-007, under the Zero Debris Approach adopted November 2023) also set an under-5-year post-mission clearance for LEO - and add a 90% disposal success probability requirement: the deorbit method must work even in credible failure cases, which pure "we'll do a burn" plans struggle to demonstrate, and which makes a drag sail's deployment reliability part of the compliance argument. The Zero Debris Charter goes further still, targeting no new debris generation by 2030 for its signatories.
The legacy 25-year guideline
The Inter-Agency Space Debris Coordination Committee (IADC) Space Debris Mitigation Guidelines (IADC-02-01, revised 2007) and NASA-STD-8719.14 carried the 25-year LEO clearance figure that shaped two decades of mission design. The guideline still exists on paper and remains useful for comparison and for grandfathered missions - but treating it as the design requirement in 2026 is planning for a regulatory environment that no longer exists. National licensing regimes (the UK, France under its Space Operations Act, Japan) are converging on the 5-year figure as well.
The other half: reentry casualty risk
Coming down in time is necessary, not sufficient. All three regimes sit alongside the same casualty cap: the probability of debris surviving reentry and injuring someone on the ground must stay below 1 in 10,000 per reentry - the threshold of the US Government Orbital Debris Mitigation Standard Practices (ODMSP) and NASA-STD-8719.14, shared across FCC, NASA, and ESA practice. It is a separate materials-and-demise analysis from the lifetime check: screen it with the reentry casualty risk tool.
Check your mission
Every check on this page is deterministic physics plus documented assumptions - runnable in an afternoon, not a study contract.
Deorbit Compliance & Orbital Lifetime Calculator
Check a post-mission disposal plan against the FCC 5-year rule, ESA Zero Debris, or the 25-year limit - and size the drag area or disposal delta-v that fixes a failing orbit.
Reentry Casualty Risk
Screen what survives reentry against the 1-in-10,000 ground-casualty limit - per-material demise and debris casualty area.
Compliance Report Generator
One disposal plan checked against all the regimes above, assembled into a printable ODAR-style report.
The FCC 5-year rule and CubeSat orbital decay
The deep dive: the decay physics, the solar-cycle problem, and the remediation options when the numbers come out wrong.
Scope of this page: a summary comparison, current as of mid-2026, of the regimes our compliance tools screen against. It is filing support, not legal advice and not a certified assessment - rules evolve, so verify against the current text of each standard (and confirm marginal screening verdicts with NASA's Debris Assessment Software (DAS) at the real disposal epoch) before you file.
References
- FCC (2022). Mitigation of Orbital Debris in the New Space Age, Report & Order FCC-22-74 - the "5-year rule" (47 CFR 25.283).
- ESA (2023). Zero Debris Approach and ESSB-ST-U-007, Space Debris Mitigation Requirements (<5-year LEO clearance).
- NASA-STD-8719.14C (2021). Process for Limiting Orbital Debris.
- IADC-02-01 (rev. 2007). IADC Space Debris Mitigation Guidelines (the legacy 25-year guideline).
- U.S. Government Orbital Debris Mitigation Standard Practices (ODMSP, 2019 update) - the 1-in-10,000 casualty limit.
