Quote, Deposit and Final Invoice Book with Customer Statements

Quote, Deposit and Final Invoice Book is an offline app (one HTML file in a zip) for a business that quotes a job, takes a deposit before it starts and bills the rest when it finishes. You write the quote once, raise the deposit invoice from it, and later a final invoice that shows the deposit already invoiced and the balance left. Each customer gets a statement of every invoice and payment.

The problem it removes: On a job that takes weeks, the deposit is invoiced in one document, the final bill in another, and somebody forgets to take the deposit off or bills it twice. Accepted quotes sit with no deposit invoice because nobody is reminded. At month end nobody can say what one customer owes across five invoices. This app links the chain from quote to deposit to final invoice to payments.

What is inside:

• Customers, quotes with lines and a deposit percentage, and a status from Draft to Accepted
• Invoices of four kinds: Full, Deposit, Part and Final. A Final invoice takes off the deposit invoices already issued for the same quote
• Payments with a check that stops you receiving more than the invoice still owes
• Money desk: accepted quotes with no deposit invoice yet, quotes waiting for an answer, overdue invoices with a WhatsApp message, and invoiced by month
• Printable quote, invoice (A4 and a short A5) and a customer statement that lists every issued invoice and payment with the balance
• VAT is a rate you enter in Settings, shown on quotes and invoices as a separate line
• Example data you can load in one click, a Start here guide and an Honest limits panel
• JSON backup and restore, CSV export, and CSV import with a check of every row before anything is added

Who it is for: contractors, fit-out and joinery shops, signage and printing businesses, event suppliers, repair and installation firms and anyone who quotes a job, asks for a deposit and bills in stages.

What it is NOT: It is not a full accounting system and does not post to one. Its invoice layout is an example: it does not claim to meet the invoice rules that apply to you, so check the wording and the VAT rate with your accountant. It does not send messages, take online payments, issue credit notes or keep stock. It is not legal, tax or accounting advice, it is not connected to any government system, bank or messaging service, and it does not file or send anything by itself. UAE e-invoicing is not part of it.

Your data stays on this device in your browser. Back it up with Export; clearing browser data loses it otherwise.

Verified by us: scripted tests in Chromium (172 checks through the real screens: adding, editing and deleting records in every table, required-field messages, backup then clear then restore, CSV export then import, keyboard order, print layouts rendered to PDF, no horizontal scrolling at 375 and 1280 pixels, no network requests) and an independent recalculation by a separately written Python evaluator of 1862 calculated values (25 randomised rows plus the example data) with 0 mismatches. Safari engine (WebKit): smoke test passed; Firefox: could not be launched. Not tested: Firefox beyond what is stated here, and no real printer was used (print layouts were checked as PDF).