United Kingdom
UK Business Calculators — VAT, Working Days, Invoice Dates & Finance Tools
Free UK business calculators — VAT at 20%, 5%, or zero rate, working days with all 8 England & Wales bank holidays excluded, invoice due dates from Net 30/60/90, gross margin, markup, and CBM shipping volume. HMRC-accurate. All tools are browser-based with no sign-up required.
20%
Standard VAT
£90k
VAT threshold
~252
Working days/year
8
Bank holidays (Eng & Wales)
Start here
What do you need to calculate?
Calculate UK working days
8 England & Wales bank holidays excluded
Calculate UK VAT
20%, 5%, or zero rate — add or remove
Find invoice due date
Net 30/60/90 from any invoice date
Add business days to a date
Find a deadline N working days out
Calculate gross margin
Gross profit margin from cost and price
Calculate CBM / shipping volume
LCL sea freight cubic metres
Practical use cases
Useful for United Kingdom businesses
Invoicing & AR follow-up
Set Net 30/60/90 due dates, adjust for bank holidays, and track overdue status in working days.
Invoice Due Date CalculatorPayroll & HR planning
Count working days in a pay period, plan annual leave windows around 8 bank holidays, and verify notice periods.
UK Working Days CalculatorVAT compliance
Add 20% standard rate or 5% reduced rate VAT to net prices. Reverse-calculate VAT from gross totals for HMRC returns.
UK VAT CalculatorFreight quotation
Calculate CBM for LCL sea freight quotes and add business days to estimate delivery windows from UK ports.
CBM CalculatorDeadline planning
Find the real business-day due date for contracts, SLA windows, and regulatory submissions with bank holidays excluded.
Real Due Date CalculatorCross-border operations
Compare UK bank holidays with EU and US calendars for cross-border invoice and project scheduling.
VAT Calculator EuropeMost searched in the UK
Tax & VAT
Working Days
Workflow tip
Use this in your UK workflow
After calculating VAT, invoice due dates, or working days, save the result into your team SOP, spreadsheet, CRM, Slack, Notion, email or checklist. Use the Copy result summary button in each calculator to paste a ready-made note your team can reference without recalculating.
Workflows
UK Business Workflows
Invoicing Workflow
- 1. Issue invoiceInvoice Due Date Calculator
Set Net 30 or Net 60 due date from invoice date
- 2. Adjust for weekendsReal Due Date Calculator
Move due date to next business day if needed
- 3. Count days remainingBusiness Days Calculator
See exactly how many working days until due
VAT & Tax Workflow
- 1. Add VAT to sell priceUK VAT Calculator
Add 20% or 5% VAT to any net amount
- 2. Check gross marginMargin Calculator
Verify cost-to-price ratio before quoting
- 3. Add EU VATVAT Calculator Europe
Calculate VAT for EU cross-border sales
Logistics Workflow
- 1. Calculate cargo volumeCBM Calculator
Get total m³ for LCL sea freight quote
- 2. Find delivery deadlineAdd Business Days
Dispatch + transit days to arrival date
- 3. Set supplier payment dateInvoice Due Date Calculator
Match supplier invoice to working-day terms
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All Tools
All UK Business Tools
UK VAT Calculator
Add or remove UK VAT at 20%, 5%, or zero rate from any amount.
VAT Calculator — Any Rate
Standard, reduced, zero rate and custom rate VAT calculations.
UK Working Days Calculator
Count working days between two dates with all 8 England & Wales bank holidays excluded.
Business Days Calculator
Count working days between any two dates, weekends excluded.
Add Business Days
Find a future date by adding N business days from any start date.
Invoice Due Date Calculator
Calculate payment due dates from invoice date and net terms (Net 7, 14, 30, 60, 90).
Real Due Date Calculator
Adjust a due date to the next business day when it falls on a weekend or public holiday.
Margin Calculator
Calculate gross profit margin from cost and selling price.
Markup Calculator
Calculate selling price from cost plus a markup percentage.
CBM Calculator
Calculate cubic metres for sea freight shipping volumes.
Reference
UK VAT Rate Reference
| Category | Rate | Examples |
|---|---|---|
| Standard rate | 20% | Most goods and services |
| Reduced rate | 5% | Domestic fuel, children's car seats, women's sanitary products |
| Zero rate | 0% | Most food, books, children's clothing, exported goods |
| Exempt | N/A | Financial services, medical care, education |
| VAT registration threshold | £90,000 | Taxable turnover in any rolling 12 months |
Rates and thresholds correct as of 2026 — verify with HMRC for current guidance.
FAQ
UK Business FAQs
What are the standard UK VAT rates?
Standard 20%, reduced 5%, zero 0%. Most goods and services are charged at 20%. Domestic fuel, children's car seats, and women's sanitary products are charged at the 5% reduced rate.
How many UK bank holidays are there in 2026?
There are 8 bank holidays in England & Wales. Scotland has 9. Northern Ireland has 10. Exact dates vary by year — always check the HMRC calendar for the current year.
What is Net 30 in the UK?
Net 30 means payment is due 30 calendar days from the invoice date. Under the Late Payment of Commercial Debts Act, statutory interest at 8% above the Bank of England base rate applies after 30 days on B2B invoices.
How many working days in the UK in 2026?
Approximately 253 for England & Wales: 365 calendar days minus 104 weekend days minus 8 bank holidays. Use the UK Working Days Calculator for exact counts between any two dates.
What is a good gross margin for UK businesses?
Retail 30–50%, services 50–70%, SaaS 70–85%, manufacturing 20–35%. Use the Margin Calculator to model your specific cost-to-price ratio.
How do I add VAT to a UK invoice?
Multiply the net amount by 1.20 for the 20% standard rate. Divide the gross by 1.20 to remove VAT. The UK VAT Calculator shows the net amount, VAT amount, and gross total together.
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All UK tools are free and browser-based. No sign-up required.