Free invoice calculators and planners for freelancers and service teams.

Calculate invoice due dates from an invoice date and payment terms, with optional weekend handling.

Calculate subtotal, tax amount, and invoice total using a custom VAT or tax rate.

Turn an hourly rate and planned hours into an invoice subtotal, tax amount, and total.

Estimate flat fees, overdue interest, and the updated amount due on a late invoice.

Plan monthly invoice send dates and see what happens when the selected day lands on a weekend.

Estimate what an invoice total looks like in a target currency using a custom exchange rate.

Plan the next invoice numbers in a sequence so recurring invoices and manual numbering stay organized.

Compare an hourly billing total against a fixed monthly retainer to see which invoice amount makes more sense.

Plan pre-due, overdue, and final reminder dates from an invoice date and payment terms.

Estimate how much time and admin cost manual invoice chasing creates each month.