# Time, mileage & expenses > Track time, mileage and expenses, and bill them to your clients. Source: https://support.billingmart.com/time-and-expenses Updated: 2026-10-19 - [Track time with a timer](https://support.billingmart.com/time-and-expenses/timers-and-time-entries.md): Run a timer or log time by hand, see how a rate turns minutes into an amount, and learn who can edit an entry and when it locks. - [Log mileage](https://support.billingmart.com/time-and-expenses/mileage.md): Record a trip with its distance, unit and rate, see how the amount is worked out, and bill it to a client. The apps do not track trips by GPS. - [Record expenses and receipts](https://support.billingmart.com/time-and-expenses/expenses-and-receipts.md): Record what you spent for a client, attach a receipt, set a markup, and decide whether the cost is billed onto an invoice or kept as your own record. - [Bill time, mileage and expenses](https://support.billingmart.com/time-and-expenses/bill-time-and-expenses.md): Turn unbilled time, mileage and expenses into lines on a draft invoice, bill each record once, and change a rate before you send. - [Put bills, expenses and invoices under tax categories](https://support.billingmart.com/time-and-expenses/tax-categories.md): Let BillingMart suggest the tax category of each bill, expense and invoice, confirm it, and read totals by category at tax time.