Invoicing Software for Business & Management Consultants

In the US, the Bureau of Labor Statistics' Occupational Outlook Handbook (page last modified August 27, 2026) says most management analysts "work as consultants on a contractual basis", and that "Self-employed analysts are paid directly by their clients, typically by either the hour or the project."

So a consultant's invoices tend to be one of two kinds: hours worked on an engagement, or a fixed fee for a project or for each month of an ongoing arrangement. Whatever your engagement letter sets out is what the invoice should follow, so check its terms before you bill.

Billed's invoice software page says "Billed keeps invoicing, estimates, expenses, time tracking and reports in one account."

For hourly work, Billed's projects page says you can "Create hourly rate projects, set hourly rates and track task charges automatically when you log tasks." Billed's help center says "Billed allows you to generate invoices against billable time log entries." For fixed fees, Billed's features page says "Manage your flat rate projects and create Invoice at any stage of the project."

For a monthly fee, Billed's invoice software page says you can "Choose the billing frequency (daily, weekly, monthly or yearly)". For clients abroad, the same page says you can "Invoice customers in multiple currencies, choosing a different currency for each invoice or customer."

These are sample figures. A consultant is hired to review a client's month-end close process at $150.00 an hour.

The consultant sets up an hourly rate project at $150.00 and logs 31.5 hours against it. 31.5 × $150.00 = $4,725.00, and the invoice generated from those time entries shows $4,725.00.

Billed's invoice software page says "Set a due date on each invoice so your client knows when to pay." and "When the invoice is ready, send it to your client by email." If it's still unpaid, it shows in Billed's invoice reports, and a payment reminder can be sent.

Billed's invoice software page says "Connect your Stripe account and every invoice you send gets a pay button, so clients can pay by card." and "Connect PayPal to add a PayPal option as well." It also says "When a client pays by check or cash, record it as an offline payment so all your income is in one place."

For follow-up, the same page says "Payment reminders can be customized." Billed's help center says "You can set a schedule of payment reminders before and after the invoice's due date."

Billed's financial reporting page says "Billed offers several built-in reports: Invoice Reports (paid, partially paid, and overdue), Expense Reports, Income vs Expense Reports, Top Selling Products, and Time Tracking Reports."

How you report consulting income and which costs you can deduct depend on where you work and how your business is set up, so ask your accountant.