The FDA’s 510(k) premarket notification is the filing that lets most Class I and Class II medical devices reach the U.S. market by showing they are substantially equivalent to a device already legally sold here. You submit it electronically through the eSTAR template at least 90 days before marketing the device, pay the user fee (currently $26,067 for fiscal year 2026, or $6,517 for qualified small businesses), and the FDA aims to decide within 90 FDA Days of accepting a complete submission.1U.S. Food and Drug Administration. Premarket Notification 510(k)2Federal Register. Medical Device User Fee Rates for Fiscal Year 2026
Who Has to File
Federal law defines the requirement by activity rather than by company type. Anyone proposing to introduce a medical device into interstate commerce for the first time must file a 510(k) at least 90 days before doing so.3Office of the Law Revision Counsel. 21 USC 360 – Registration of Producers of Drugs, Devices, and Cosmetics That captures domestic manufacturers launching a new product, foreign companies selling into the U.S. market, and specification developers who design a device but contract out the manufacturing. Repackagers and relabelers also need to file when their changes significantly alter the device’s labeling or physical condition.
A manufacturer with a device already on the market must file a new 510(k) before making changes that could significantly affect safety or effectiveness, including major changes to design, materials, energy source, manufacturing process, or intended use.4eCFR. 21 CFR Part 807 Subpart E – Premarket Notification Procedures
Most Class I devices and some Class II devices are exempt from the 510(k) requirement, provided they stay within the limitations set out in FDA classification regulations.5U.S. Food and Drug Administration. Class I and Class II Device Exemptions An exemption disappears if the device is intended for a use of substantial importance in preventing impairment of health, or if it presents a potential unreasonable risk of illness or injury. Class III devices generally require the more rigorous Premarket Approval process rather than a 510(k), unless they’ve been downclassified.
The Substantial Equivalence Standard
The entire process turns on whether your device is substantially equivalent to a legally marketed predicate. The FDA applies a two-part test: your device must have the same intended use as the predicate, and it must either share the same technological characteristics or, if the technology differs, those differences cannot raise new questions of safety and effectiveness.
A predicate can be any legally marketed U.S. device. That includes one cleared through a previous 510(k), one sold before the May 28, 1976, amendments took effect, a former Class III device that was later downclassified, or even a 510(k)-exempt device.6U.S. Food and Drug Administration. How to Find and Effectively Use Predicate Devices Most applicants pick a recently cleared 510(k) device because the comparison is more straightforward and the data more current. The FDA’s public 510(k) database is the starting point for identifying candidates.
If your device has different technological characteristics from the predicate, the burden gets heavier. You need to demonstrate through testing that those differences don’t create new safety risks and that the device performs at least as well as what’s already on the market. Bench testing, and sometimes clinical data, becomes essential rather than optional.
Choosing the Right Submission Type
The FDA offers three 510(k) types with different evidentiary burdens. Picking the right one can save weeks.
Traditional 510(k)
This is the default. It applies whenever you are introducing a new device or making changes that don’t qualify for one of the streamlined options. You submit a full data package covering intended use, technological characteristics, performance testing, and labeling, and the agency reviews everything from scratch.
Special 510(k)
The Special 510(k) is available only when you are modifying a device you have already cleared and the changes don’t affect the intended use or alter the fundamental scientific technology. Instead of resubmitting comprehensive test data, you rely on your own design control processes to verify and validate the modification, then declare that you followed those controls. Review is faster because the scope is narrower. This is the path for incremental updates, not significant redesigns.
Abbreviated 510(k)
The Abbreviated 510(k) lets you lean on FDA-recognized consensus standards or special controls already established for your device type. Rather than generating raw performance data for every characteristic, you submit summary reports showing your device meets those published benchmarks.
When No Predicate Exists
Some devices are genuinely novel with no legally marketed predicate but pose only low-to-moderate risk. The 510(k) pathway does not work here because there is nothing to establish substantial equivalence against. The De Novo classification request fills that gap, and the FDA recommends a pre-submission meeting before taking that route.7U.S. Food and Drug Administration. De Novo Classification Request
What Goes in the Submission
A 510(k) is a substantial document package assembled inside the electronic Submission Template and Resource (eSTAR), a free interactive PDF the FDA requires unless it has granted a waiver.8U.S. Food and Drug Administration. eSTAR Program The template walks you through every required field with built-in logic that flags missing information before you finalize. Using it correctly prevents the most common administrative rejections.
Device Description and Labeling
You need a detailed device description covering physical specifications, components, materials, and chemical composition, supported by photographs and engineering drawings. All labeling, including packaging art and instructions for use, must clearly state the intended use. Every device label must carry a Unique Device Identifier (UDI) in both plain text and a machine-readable format.9eCFR. Labeling Requirements for Unique Device Identification Reusable devices reprocessed between uses need a permanent UDI marking on the device itself, and software regulated as a medical device must display its UDI on startup or through a menu command.
Predicate Comparison and Performance Data
The comparison to your predicate is the legal core of the application. You lay out intended use, technological characteristics, and any differences, then provide testing data that bridges those differences. Bench testing measures things like mechanical strength, battery life, or software reliability under simulated conditions. Biocompatibility assessments confirm that materials contacting the body don’t cause adverse reactions. Tests should follow recognized standards so the review team can evaluate them against established benchmarks.
Clinical data from human trials is sometimes required when bench testing alone can’t prove equivalence for a particular use case. Most 510(k) submissions don’t reach this threshold, but complex devices or novel intended uses may require it.
510(k) Summary or Statement
Every submission includes either a 510(k) Summary, which provides a high-level overview of the device and predicate comparison and becomes public once the device is cleared, or a 510(k) Statement, in which the manufacturer agrees to provide safety and effectiveness data to anyone who requests it.
Cybersecurity for Connected Devices
Any device that includes software, can connect to the internet, and could be vulnerable to cybersecurity threats qualifies as a “cyber device” under Section 524B of the Federal Food, Drug, and Cosmetic Act. For these devices, the submission must include a plan for monitoring and addressing post-market vulnerabilities, evidence of processes to keep the device secure, and a Software Bill of Materials listing all commercial, open-source, and off-the-shelf software components.10U.S. Food and Drug Administration. Cybersecurity in Medical Devices: Frequently Asked Questions (FAQs) The FDA will place a submission on technical screening hold if the cybersecurity section of the eSTAR template is incomplete. This trips up more manufacturers than you’d expect, particularly those bringing legacy hardware into a connected environment for the first time.
User Fees and Small Business Qualification
The FDA won’t begin reviewing your submission until the user fee is paid in full. For fiscal year 2026 (October 1, 2025, through September 30, 2026), the standard 510(k) fee is $26,067. Qualified small businesses pay $6,517.2Federal Register. Medical Device User Fee Rates for Fiscal Year 2026 These fees change annually, so verify the current amount before submitting.
To qualify for the small business rate, your company must have gross receipts or sales of no more than $100 million for the most recent tax year, including the revenue of all affiliates.11Food and Drug Administration. Medical Device User Fee Small Business Qualification and Determination – Guidance for Industry, Food and Drug Administration Staff and Foreign Governments Timing matters. You need to submit your small business determination request at least 60 days before filing your 510(k). If you file before the FDA confirms your status, you owe the full fee. U.S. businesses provide a copy of their most recent federal income tax return with the request; foreign businesses submit a National Taxing Authority Certification instead.
Separate thresholds exist for other fee benefits. Companies with gross receipts at or below $30 million may qualify for a first premarket application fee waiver, and those at or below $1 million may qualify for a waiver of the annual establishment registration fee.
How the Review Works
Once your eSTAR package is assembled and the user fee paid, you upload everything through the FDA’s CDRH Portal. The review clock starts once the FDA confirms receipt of both the submission and the fee payment.
Pre-Submission Feedback
Before filing, the FDA’s Q-Submission program lets you request written feedback or a meeting with reviewers about your planned 510(k).12U.S. Food and Drug Administration. Requests for Feedback and Meetings for Medical Device Submissions: The Q-Submission Program It is optional but genuinely useful for borderline predicate choices, novel testing approaches, or uncertainty about which submission type to use.
Refuse to Accept Screening
The first formal hurdle is the Refuse to Accept (RTA) screening, completed within 15 calendar days of receipt.13Food and Drug Administration. Refuse to Accept Policy for 510(k)s This is a purely administrative check. If something is missing, the FDA sends a notification identifying the gaps, and no scientific evaluation happens until you pass. The most common RTA triggers are incomplete eSTAR sections and missing labeling documents.
Substantive Review and the AI Response Window
Once accepted, the lead reviewer conducts a scientific evaluation of your data. A substantive interaction with the submitter should occur within 60 calendar days of receipt. During this phase, the reviewer may issue an Additional Information (AI) request if there are gaps in your technical arguments or testing data.
You have 180 calendar days from the date of the AI request to submit a complete response. No extensions are granted. If the FDA doesn’t receive a complete response within that window, the submission is considered withdrawn and deleted from the review system, and you’d have to start over with a new submission and a new fee.14U.S. Food and Drug Administration. 510(k) Submission Process
Decision Timeline
The FDA’s goal is to reach a decision within 90 FDA Days, which is calendar days minus any days the submission was on hold for an AI request. That distinction matters. In practice, total elapsed time from submission to clearance frequently runs well beyond 90 calendar days once holds are factored in. A positive finding of substantial equivalence results in a clearance letter authorizing commercial distribution. A “not substantially equivalent” determination means you cannot market the device through the 510(k) pathway; you can pursue De Novo classification, file a Premarket Approval application, or submit a new 510(k) with a different predicate or additional data. You cannot market the device while pursuing those alternatives.
Third-Party Review Option
For low-to-moderate risk devices, the FDA’s Third Party Review Program is a voluntary alternative. You send your 510(k) to an accredited review organization that evaluates it using the same criteria the FDA would apply, and the organization forwards its review and recommendation to the FDA, which makes the final determination within 30 days of receiving that recommendation.15U.S. Food and Drug Administration. 510(k) Third Party Review Program Roughly half of all 510(k)-eligible devices qualify. Eligibility depends on the device’s product code, which you can verify through the FDA’s product code database.
What You Owe the FDA After Clearance
A clearance letter opens the door to commercial distribution but locks you into a permanent regulatory relationship. Overlooking post-market requirements is one of the most expensive mistakes a manufacturer can make.
Establishment Registration and Device Listing
Every manufacturing establishment must register annually with the FDA during the window from October 1 through December 31, using the FDA’s electronic registration system (FURLS). During that same period, review and update all device listing information on file, confirming its accuracy even if nothing has changed. Failing to register or list on time means your establishment is not considered active, and your information may disappear from the FDA’s public database until you come into compliance.16eCFR. 21 CFR Part 807 – Establishment Registration and Device Listing for Manufacturers and Initial Importers of Devices
Medical Device Reporting
If your device may have caused or contributed to a death or serious injury, or if it malfunctions in a way that could lead to such harm if repeated, you must report the event. Manufacturers have 30 calendar days from becoming aware of the event to file a report, or just 5 work days when the event requires immediate corrective action to protect public health. “Serious injury” in this context means life-threatening harm, permanent impairment of body function, permanent damage to body structure, or an injury requiring medical intervention to prevent those outcomes.17eCFR. 21 CFR Part 803 – Medical Device Reporting
Quality Management System
Manufacturers must maintain a documented quality management system that complies with ISO 13485 and the additional requirements of 21 CFR Part 820. That covers design controls, production processes, complaint handling, corrective actions, and record-keeping. For Class II and Class III devices, compliance with design and development requirements is mandatory. The quality system must maintain records for every complaint received, including the device name, date, nature of complaint, and corrective action taken.18eCFR. 21 CFR Part 820 – Quality Management System Regulation
Penalties for Skipping the Process
Introducing a device without a required 510(k) is a prohibited act under federal law.19Office of the Law Revision Counsel. 21 USC 331 – Prohibited Acts A first offense is a misdemeanor carrying up to one year of imprisonment and a fine of up to $1,000. A second conviction or an intentional violation jumps to a felony: up to three years of imprisonment and a fine of up to $10,000.20Office of the Law Revision Counsel. 21 USC 333 – Penalties
Beyond criminal exposure, the FDA can impose civil penalties for device-related violations of up to $15,000 per violation and $1,000,000 for all violations in a single proceeding. Knowingly selling a counterfeit device carries a sentence of up to ten years.