A Title V permit is issued for a fixed term, no more than five years, and the renewal clock starts the day it is signed. Renewal is not a rubber stamp. It is a full application: the agency re-examines the source, the regulations that changed over five years get incorporated, and the facility certifies where it stands on every requirement. For programs that run on spreadsheets, it is also the moment the archaeology begins.
The timeline that matters
Under 40 CFR 70.5, a timely renewal application must generally be submitted at least 6 months before the permit expires, and state programs may require filing as early as 18 months out. The date is not a formality, because of what filing on time buys you.
The application shield
File a timely and complete application, and 40 CFR 70.7(b) provides that the source may continue operating under its expired permit until the agency takes final action. Miss the window, and that protection is gone: an expired permit with no shield is an operating problem no facility wants to explain. The shield is the single best reason renewal preparation should start a year or more before expiration, not a quarter.
What the application actually reconciles
Three streams of five-year history converge in a renewal package.
Compliance history. The application includes a compliance certification: which requirements the source met, which it did not, and compliance schedules for any gaps. Assembling this honestly requires the deviation record, the monitoring record, and the reports filed over the term, reconciled against every condition.
Regulatory change. Rules move during a five-year term. NSPS and NESHAP revisions, state SIP changes, new applicable requirements: each must be identified and incorporated. A permit deconstructed in 2021 describes 2021 regulations; the renewal must describe today's.
The facility itself. Emission inventories get updated, new or modified units get captured, and operating changes since issuance get documented.
None of this is intellectually hard. All of it is brutal when the records live in spreadsheets built by someone who left in year three. Renewal is where the hidden costs we described in the spreadsheet article come due at once.
Renewal from a living register
Now run the same renewal from a maintained condition register. The compliance history is not reconstructed; it is exported, because every deadline, report, and deviation was tracked against cited conditions as it happened. The applicable requirements are current, because the register flags regulation changes against live sources rather than memory. The inventories draw from tracked emission data instead of a year-end scramble.
In AirComply, renewal preparation starts from the register the original deconstruction created: the platform assembles the application sections from tracked data, flags the requirements that changed since issuance for professional review, and stages the compliance certification for the Responsible Official. The judgment calls, how to characterize a deviation, whether a changed rule applies, what schedule to propose for a gap, remain exactly where they belong: with the licensed professional who signs. What disappears is the archaeology.
Five-year permits mean renewal is not an event. It is a fifth of the job, every year. Programs that treat it that way, with records built for it, file on time, keep the shield, and spend the saved weeks on the findings instead of the filing. Ask us to walk your renewal timeline.