The office: the records the law makes you keep and for how long, the job file that wins complaints, and the four systems a two-truck shop needs
In one paragraph
Somewhere between the second truck and the fifth employee, the business stops fitting in your head and starts living in files, and the law has opinions about which files and for how long. This lesson lists them with the section beside each: every contract, document, receipt and disbursement for five years after the job (CSLB), pay stubs and payroll records for three years (Labor Code), the I-9 for three years from hire or one after separation, tax records for three to six years and employment tax records for four (IRS), IIPP training and inspection records for one year (Cal/OSHA), and the job file itself for at least the four-year complaint window and ten for structural work. It then gives the job-file structure that closed Phase 5's three-years-later complaint in an afternoon, and the four systems a small shop actually needs: a job file per job, a calendar of deadlines, a dispatch board that records hours as they happen, and a monthly close that produces the three numbers in the next lesson.
The rule
A licensee must make and keep records showing all contracts, documents, records, receipts and disbursements of its transactions as a contractor and have them available for inspection by the registrar for at least five years after completion of each project (B&P 7111(a)); pay statement copies and payroll records are kept at least three years (Labor Code 226(a), 1174(d)); Form I-9 is kept three years after hire or one year after termination, whichever is later (8 CFR 274a.2); employment tax records at least four years and income tax records generally three, or six where income was underreported by more than 25 percent (IRS); IIPP training and inspection records at least one year (8 CCR 3203(b)). The job file that satisfies 7111 is also the one that answers a complaint filed within the four-year window of 7091.
Why it matters
Every enforcement process in this track ends the same way: someone asks for a document, and you either have it or you do not. CSLB can discipline you for not keeping the records at all, the Labor Commissioner decides a wage claim on your timesheets or the employee's memory, and Phase 5 showed a complaint closing on photograph 22. The office is not overhead. It is the part of the business that keeps the license, and it can be built in a weekend if you build it before you need it.