The InvoiceAdept blog.

InvoiceAdept vs QuickBooks: see the 2026 UK guide

This older short InvoiceAdept vs QuickBooks page now points to the full 2026 UK guide on invoicing vs accounting, CIS, WhatsApp and pricing.

How to calculate late payment interest UK (2026): Bank Rate + 8% and compensation

How to calculate UK B2B late payment interest in 2026: Bank Rate + 8% (11.75% while Bank Rate is 3.75%), six-month reference dates, £40/£70/£100 compensation, worked examples. Sourced from GOV.UK and Bank of England — no unsourced survey stats.

VAT Domestic Reverse Charge for Builders: Invoicing Guide

The VAT domestic reverse charge for construction: when it applies, who invoices what, and how to keep your invoices compliant.

Self-Employed Mileage Allowance 2026: Rates for Tradespeople

HMRC's 2026 mileage rates for self-employed tradespeople: 45p first 10,000 miles, 25p after — and what counts as a business mile when you work on site.

Invoice numbering UK rules (2026): HMRC sequential numbers, VAT and gaps

Practical UK invoice numbering rules for 2026: what HMRC requires on VAT invoices, how sequential series work, gaps and voids, year/branch prefixes, sole trader vs limited company, CIS and proforma vs tax invoices.

CIS monthly returns UK (2026): CIS300, deadlines, verification and deductions

Contractor CIS300 guide for 2026: you deduct 20%/30%/0% from labour (HMRC does not), file by the 19th, verify first, materials evidenced. InvoiceAdept does not file CIS300.

Deposit invoice template UK (2026): VAT tax point, refunds and what to put on it

UK trades deposit invoice for 2026: what to put on the PDF, VAT tax point on advances, Consumer Rights refunds, CIS on contractor deposits, and the balance invoice. VAT threshold £90,000. InvoiceAdept keeps records; it does not file to HMRC.

How to invoice a client in the UK as a tradesperson (2026)

Who you are billing decides everything: CIS, reverse charge, deposits, and where to send the invoice. The 2026 on-site version for UK trades.

Domestic reverse charge invoice UK: CIS wording, worked example, and when you must not charge VAT

How to raise a UK domestic reverse charge invoice for CIS construction work. HMRC wording, a 20% CIS worked example, the end-user notice, and when you must not charge VAT.

How to send a WhatsApp invoice in the UK (and get paid from the chat)

Send a UK trade invoice on WhatsApp with a pay link. Why it beats email for homeowners, how InvoiceAdept Pro sends it, and how that differs from Yoley.

MTD invoicing software for UK tradespeople 2026: records vs filing

Set Your Day Rate as a Tradesperson UK

Discover how to effectively set your day rate as a UK tradesperson. Maximise your earnings and avoid common pricing mistakes in 2026.