Free Invoice Chase Tools
18 free tools to help you chase unpaid invoices, generate payment reminders, calculate late fees and interest, build follow-up schedules, and decide when to write off bad debt — no account needed. UK tools use the Late Payment of Commercial Debts Act 1998 rates.
Payment Reminder Email Generator
Generate professional payment reminder emails in 5 tones — from friendly to final notice. Enter client details and copy the exact email to send. No signup required.
Invoice Follow-Up Schedule Planner
Build a complete payment follow-up timeline from your invoice due date. Choose relaxed, normal, or strict chase style. Export as PDF or CSV.
Late Payment Fee Calculator
Calculate exactly how much interest or late fees your client owes on an overdue invoice. Supports monthly %, annual %, and flat fee rates.
Payment Reminder Scheduler
Generate a complete invoice chase timeline with exact dates. Enter invoice date, due date, and client type — get a step-by-step schedule with tone and channel for each reminder.
Invoice Due Date Calculator
Calculate the exact due date for Net 7, Net 15, Net 30, Net 60, or Net 90 payment terms from any invoice date. Get a suggested reminder schedule too.
AR Aging Report Generator
Enter your unpaid invoices and generate a professional accounts receivable aging schedule grouped by 0–30, 31–60, 61–90, and 90+ days overdue.
Invoice Write-Off Calculator
Calculate collection probability and expected recovery value to decide whether to keep chasing, escalate to a collection agency, or write off an overdue invoice as bad debt.
Late Fee Clause Generator
Generate professional late fee clauses for contracts and invoices. Choose monthly %, annual %, or flat fee — get two ready-to-use versions: contract clause and invoice notice.
Invoice Tracker Spreadsheet Template
Download a free Excel and Google Sheets invoice tracking template. 16 columns covering invoice number, client, amount, due date, status, overdue days, and full chase reminder history.
DSO Calculator — Days Sales Outstanding
Calculate your Days Sales Outstanding and compare it against industry benchmarks. See your cash flow opportunity and how much working capital faster collection would free up.
UK Late Payment Interest Calculator
Calculate UK statutory interest on late-paid B2B invoices under the Late Payment of Commercial Debts Act 1998. Auto-applies Bank of England base rate + 8% plus fixed compensation.
Invoice Interest Compounding Calculator
Compare simple vs compound interest on overdue invoices. See the month-by-month breakdown of how late payment interest accumulates. Useful for drafting late fee clauses.
Payment Terms Clause Generator
Generate ready-to-paste payment terms clauses for invoices and contracts. Choose Net terms, late fees, deposit requirements, and accepted payment methods.
Late Payment Cash Flow Calculator
See exactly how much money is trapped in outstanding invoices and what late payments cost your business per year. Enter revenue, terms, and average lateness.
Bad Debt & Write-Off Risk Calculator
Calculate your bad debt reserve using industry write-off rates by AR age bucket. See which overdue invoices need urgent action before they become unrecoverable.
AR Turnover Ratio Calculator
Calculate your accounts receivable turnover ratio and Days Sales Outstanding. Compare against industry benchmarks (consulting, retail, manufacturing, SaaS) and see how to improve.
Early Payment Discount Calculator (2/10 Net 30)
Calculate early payment discounts for 2/10 Net 30 and custom terms. See the discount amount, net payment, and annualized cost of forgoing the discount.
Invoice Email Template Generator
Generate professional invoice emails for every stage: new invoice sent, follow-up, overdue notice, final notice, and payment received. Fill in details and copy.
Want the full invoice tracker?
These tools are free forever. For a Kanban board that tracks every invoice, logs chase history, and shows who to chase today — try InvoiceGrid Pro.
See PricingOther Freelance Tools
General business calculators — not directly related to chasing invoices, but useful for freelancers.
Frequently Asked Questions
Are these invoice tools really free?+
Yes — all tools are completely free with no signup, no credit card, and no hidden limits. Most work in your browser; the spreadsheet template is a direct download.
What is a payment reminder email generator?+
A payment reminder email generator creates professional, ready-to-send emails for chasing unpaid invoices. Enter the client name, invoice amount, and due date — get the exact email in 5 tones from friendly to final notice.
How do I calculate a late payment fee?+
Use the Late Payment Fee Calculator. Enter the invoice amount, agreed interest rate (e.g. 1.5% per month), and number of days overdue. It calculates the exact fee to add to your invoice.
What is Days Sales Outstanding (DSO)?+
DSO measures how many days on average it takes you to collect payment after invoicing. Formula: (Total AR ÷ Revenue) × Days in Period. A DSO of 45 means you collect payment 45 days after invoicing on average. Lower DSO = faster collection = better cash flow. Use the free DSO Calculator to calculate yours and compare against industry benchmarks.
What is Net 30 and how do I calculate the due date?+
Net 30 means payment is due 30 calendar days from the invoice date. Use the Due Date Calculator to instantly find the due date for Net 7, 15, 30, 60, or 90 terms from any invoice date.
What is an AR aging report?+
An accounts receivable aging report groups your unpaid invoices by how overdue they are: 0–30 days, 31–60 days, 61–90 days, and 90+ days. It helps you prioritise which invoices to chase first and see your overall AR health.
What is a bad debt reserve and how do I calculate it?+
A bad debt reserve is the portion of your AR you estimate will never be collected. Calculate by applying industry write-off rates to each age bucket: ~0.5% of current AR, 4% of 1–30 day overdue, 10% of 31–60 day, 22% of 61–90 day, and 50% of 90+ day AR. Use the Bad Debt Calculator above to get your number instantly.
How much do late payments actually cost my business?+
More than most businesses realise. The Cash Flow Impact Calculator shows the exact amount: for a business with £15,000 monthly revenue on Net 30 terms where clients pay 21 days late, approximately £25,500 is permanently tied up in AR — costing £2,040/year at an 8% rate. Plus the time spent chasing (industry average: 1.5 hours/week).