Cash Flow Calculators

Profit on paper and cash in the bank diverge whenever clients pay slowly. Net 30 feels friendly until three invoices stack and payroll still hits on Friday. Cash flow tools focus on timing: when payment is due, what overdue balances might cost, how many days sales sit in receivables, and a simple forward view of money in and out.

Use this category when you invoice with payment terms, chase aging AR, decide whether late fees belong in your contract, or want a plain forecast without a full accounting system. It sits next to payment processing (what you keep after fees) and business health (margins and runway)—here the subject is when cash moves.

The Invoice Due Date Calculator turns Net 15 / 30 / 45 / 60 (or custom days) into a calendar date and shows whether you are early or overdue. Put that date on the invoice clearly; buried terms get ignored. If your agreement allows overdue charges, the Late Fee Calculator estimates what a late balance might add—useful for policy design, not as a substitute for relationship judgment.

The Accounts Receivable Days Calculator (AR days / DSO-style math) answers how long sales take to become cash on average. Rising AR days with stable sales is a warning light: you are financing customers. The Cash Flow Forecast Calculator then helps you sketch a near-term path—expected inflows and outflows— so due dates and AR reality show up before the shortfall does.

These calculators assume the inputs you provide. They do not sync to your bank or books. Re-run them when terms change, a large invoice goes out, or a client slips—cash planning is a habit, not a one-time report.