Type your tonnage. Get the 10-tonne threshold answer, the bill at the 2026-27 rate of £228.82 a tonne, the late-filing penalty and the exact HMRC due date.
Registration status
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Tonnage counted toward the 10 t threshold
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t
Chargeable tonnage this period
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t
Rate applied
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£/t
Tax due this period
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£
Late penalty so far
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£
Total exposure
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£
Return and payment due
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Keep the quarter, not just the answer
Every figure above is free, forever, with no key and no cap. The $60 licence key adds CSV export of each quarter's eight figures — including the £1,928.46 tax line and the £1,340 penalty line — for your records and HMRC evidence, plus a browser alarm 30, 14 and 1 days before the due date the tool just calculated. $60 once · one licence key per person or team seat · 7-day full refund. UK tax advisers bill £75 to £250 an hour, and a Plastic Packaging Tax registration-and-return review is rarely under two hours.
The 2026-27 rate, already in Charges taxable tonnage at £228.82 per tonne, the rate HMRC uprated to on 1 April 2026, and keeps the 2025-26 rate of £223.69 selectable for corrected earlier periods.
10-tonne registration test Nets exempt tonnage off your rolling 12-month total and says whether you have crossed 10 tonnes and must register within 30 days.
30% recycled-content split Charges only the share of a quarter's tonnage that sits in components below 30% recycled plastic, instead of averaging recycled content across the whole company.
£500 plus £40-a-day clock Adds the fixed £500 penalty and £40 for each day past the deadline, so the cost of finding out late is a number rather than a worry.
Due date from your period end Returns the last working day of the month after your accounting period end, stepping back off Saturdays and Sundays the way HMRC does.
CSV export and deadline alarm With the $60 key, saves each quarter's figures as a CSV row for your records and sets a browser alarm ahead of the due date the tool calculated.
Get the complete version $60
This page is the working piece. The full pack has everything below.
Type your tonnage. Get the 10-tonne threshold answer, the bill at the 2026-27 rate of £228.82 a tonne, the late-filing penalty and the exact HMRC due date.
UK tax advisers bill £75 to £250 an hour, and a Plastic Packaging Tax registration-and-return review is rarely under two hours.
It turns eight numbers about your packaging into eight you can file on. On its shipped example it returns 40.5 t counted toward the 10 t threshold, 8.428 t chargeable, £228.82 per tonne, tax of £1,928.46, a late penalty of £1,340, total exposure of £3,268.46, and the due date Friday 30 October 2026.
Who is it for?
UK manufacturers and importers of finished plastic packaging who handle ten tonnes or more in a rolling twelve months, plus the bookkeepers, finance managers and accountants who file their quarterly HMRC Plastic Packaging Tax return. It is built for the person who has the tonnage spreadsheet open and needs a number today.
Why will a free chatbot not do this?
The rate changes every April. Ask a chatbot today and it will usually quote £223.69, the 2025-26 rate, instead of £228.82 - on the worked example in the README that is £43.23 of wrong tax. It also will not net off exempt tonnage, split the 30% recycled test, or find the last working day of the month.
What is free and what costs money?
Every calculation is free forever - no key, no watermark, no cap. On the shipped example that free tier hands you the £1,928.46 tax line, the £1,340 penalty line and the £3,268.46 total. The $60 key adds a different axis: CSV export so you own the record, and a deadline alarm. It never blocks an answer.
What would this cost if a person did it?
UK tax advisers bill £75 to £250 an hour, and a Plastic Packaging Tax registration-and-return review is rarely under two hours, so the cheapest human pass costs more than the key. The extension is $60 once, with a seven-day full refund, and runs entirely in your browser.
Ask about this tool
One question, answered by the person who built it. Your email only if you want the answer sent.
Same job, next tool
Free in the browser. The full version is a one-time licence, 7-day refund.