🏥 FDA Submission Timeline Calculator
Estimate months to clearance by regulatory pathway
Understanding FDA Device Pathways
The FDA clears or approves medical devices through several pathways based on risk. The 510(k) pathway is the most common, used when a device is substantially equivalent to an existing legally marketed device (a predicate). The FDA's statutory review clock for a 510(k) is 90 days, but real-world total time from submission to clearance averages 3-6 months because of Additional Information (AI) requests that pause the clock. Total time including preparation typically runs 6-12 months.
The De Novo pathway serves novel low-to-moderate risk devices that have no predicate. It takes longer than a 510(k) — typically 9-18 months total — because the FDA must establish a new device classification. The PMA (Premarket Approval) pathway applies to high-risk Class III devices and is the most demanding, usually requiring clinical trials and taking 1-3 years or more from submission to approval.
Why Pre-Submission Meetings Matter
A Pre-Submission (Q-Sub) meeting lets you get FDA feedback on your regulatory strategy, testing plan, and predicate choice before you submit. Companies that complete a Q-Sub generally experience fewer Additional Information requests and a smoother review. While the Q-Sub itself adds 2-3 months upfront, it often reduces total time-to-clearance by avoiding costly back-and-forth later.
Frequently Asked Questions
Is the 90-day FDA review clock the same as time to clearance?
No. The 90-day figure is the FDA's review goal for active review days. When the FDA issues an Additional Information request, the clock stops until you respond. Real-world 510(k) clearance commonly takes 4-6 months of calendar time, and longer for complex devices.
What is a predicate device?
A predicate is a legally marketed device that your device is substantially equivalent to. Identifying a strong predicate is the foundation of a 510(k) submission. No valid predicate usually means you need the De Novo or PMA pathway instead.
Do all devices need clinical data?
No. Most 510(k) submissions rely on bench testing and comparison to a predicate. Clinical data is more common for De Novo and almost always required for PMA. Software and AI/ML devices increasingly require clinical validation.
This calculator provides planning estimates only and is not regulatory or legal advice. Consult a qualified regulatory affairs professional for your specific device and submission strategy.