Accounting

Add or extract VAT/GST at UK, EU, and worldwide rates. Net, tax, and gross in one pass.

Day rate ↔ hourly, weekly/monthly estimates, and simple UK take-home sketches.

Straight-line and declining-balance schedules — fully client-side.

Validate IBANs, extract bank/branch/account fields, and resolve SWIFT/BIC from a local directory.

Bulk invoice numbers and payment references with custom prefixes.

Paste two amount lists or CSV columns and find matches, misses, and diffs.

Compare two invoice-number lists and extract matches or missed entries.

Due dates from net 30/EOM with UK bank holidays, plus statutory late-payment interest.

Checksum and format validation for UK and EU VAT numbers — no VIES call required.

Self Assessment, corporation tax, and VAT filing dates from your year end or quarter.

Income tax (English & Scottish bands), employee NI, student loans, and pension relief.

Limited-company director sketches — salary, dividends, corporation tax, and personal tax.

19%/25% bands with marginal relief, associated companies, and instalment thresholds.

Payment breakdown, interest vs principal, and the impact of overpayments.

Normalise bank CSV exports into one date / description / amount format for reconcile tools.

HMRC approved mileage rates and simplified home-working expenses — fully client-side.

Convert between cost, sell price, margin %, and markup % without mixing the two up.

Turn an IBAN, amount, and reference into a scannable EPC payment QR code.