Travel admin, explained

The practical side of mixing work and personal travel — bills, folios, expense reports.

• Can you extend a business trip for personal days?

  Permission is the easy part. Here is what to ask the hotel, and in what order.

• How to split a hotel bill between business and personal

  Ask at check-in, use the right words, and check the four details most people miss.

• Expense reports with personal days: what finance accepts

  What a reviewer checks, the documents that work, and a five-minute check before you submit.