First you take everything that repeats out of your evening: paperwork, invoices, following up on quotes, return calls. For one week you note what gets left for after hours and split it into recurring and one-off. Recurring work can be batched or handed off without hiring anyone, and only the rest shows whether you really need an office assistant.
Read the full article: https://impruvement.com/blog/still-in-the-office-after-closing-time-what-work-you-take