Is my data secure and is this site safe?

Yes. InvoiceNudge operates with a strict Zero Server Storage architecture. All invoice amounts, client names, banking details, and emails are processed strictly in your browser's private JavaScript memory. No data is sent to external servers or databases.

When should I send the first payment reminder?

The optimal window for a First Notice (Gentle Reminder) is 1 to 3 business days following the maturity due date, assuming an innocent administrative delay and re-attaching invoice documentation.

Can I legally charge late fees or interest if they weren't in my contract?

Yes, in most commercial jurisdictions through statutory prejudgment interest and prompt payment legislation such as UCC Article 2 merchant benchmarks (18% APR), California Civil Code § 3287 (10% APR), and the UK/EU Late Payment of Commercial Debts Act.

What should I do if the client completely ignores my notices?

Follow a progressive escalation ladder: Accounts payable escalation, deliverable and service freeze, formal final demand letter with a 7-day cure period, and subsequently small claims filing or commercial debt collection.

Freelance Late Fee Calculator (Statutory Commercial Interest)

Compute daily accrued statutory late fees on overdue client invoices under Uniform Commercial Code (UCC) § 2-607 benchmarks, California Civil Code § 3289 (10% APR), Florida Statute § 687.03, and UK/EU Late Payment directives. 100% private in-browser computation with zero server storage.

Statutory Interest Formulas & Usury Limits

UCC § 2-607 Commercial Benchmark: 18.00% APR (1.50% monthly) for B2B standard commerce.
California Civil Code § 3289: 10.00% APR statutory prejudgment interest for commercial breach of contract.
New York CPLR § 5004: 9.00% APR statutory prejudgment interest on liquidated debts.
Texas Finance Code § 302.002: 6.00% APR statutory legal rate when interest is unspecified in contract.
Florida Statute § 687.03: Up to 18.00% APR agreed contractual ceiling ($500k and under).
UK Late Payment of Commercial Debts Act: 8.00% + Bank of England Base Rate plus mandatory statutory debt compensation (£40 - £100).

Loading interactive calculator... If JavaScript is disabled, you can reference the statutory benchmark table above to compute simple interest: Principal × (APR / 365) × Days Overdue.

InvoiceNudge – Overdue Invoice Email Generator & Freelance Late Fee Calculator

A court-compliant B2B past-due notice generator, escalation engine, and statutory interest calculator with 100% in-browser confidentiality (Zero Server Storage). Please enable JavaScript to access the interactive calculation engine and live A4 PDF export.