Finance & Accounting Workspace
FinCheckLab is a toolkit for validating bank details, VAT numbers, and payment codes. Check IBAN, SWIFT/BIC, and EU VAT—all in one place.
Bank & Payments
IBAN Validator
IBAN validator online: validate one or many IBANs (bulk, one per line). Format and mod-97 check. Export CSV/JSON.
SWIFT/BIC Checker
SWIFT BIC checker: validate SWIFT/BIC code format and structure online.
Bank Code Checker
UK sort code and US ABA routing number validator. Validate bank code format.
FX Conversion Checker
FX conversion calculator: convert amount using exchange rate (× or ÷).
Checksum Validator (Luhn)
Luhn checksum validator: validate mod-10 check digit on numeric strings.
Rate Consistency Validator
Rate consistency checker: verify Amount B equals Amount A × Rate.
Country Match Validator
Country code match: compare two ISO country codes (e.g. from IBAN and VAT).
Spread Analyzer
Bid ask spread calculator: mid rate, absolute spread, spread %.
Tax & VAT
VAT Number Checker
VAT number checker EU: validate EU VAT number format by country (format only; for VIES use ec.europa.eu/vies).
Tax Calculation Checker
Tax calculation checker: compute net, tax, and gross for multiple amounts; optional tax % per row.
Tax Deduction Validator
Tax deduction calculator: apply % or fixed deduction to taxable amount with optional cap.
Country Validation Tool
ISO country code validator: check if EU/EEA for VAT.
Invoicing & Documents
Invoice Total Validator
Invoice total validator: verify invoice totals and line items add up correctly.
Rounding Error Finder
Rounding error finder: sum amounts and compare with expected total to spot rounding errors.
Due Date Validator
Invoice due date calculator: due date from invoice date and terms. Presets: Net 30, 15, 45, 60.
Late Payment Penalty Calculator
Calculate penalty for late payment (principal, days late, annual %).
Interest Checker
Simple and compound interest calculator (principal, rate %, days).
Expense Categorization Checker
Expense category limit checker: amount vs category limit; remaining or excess.
Payroll & Compliance
Net/Gross Validator
Net gross validator VAT: convert and validate net vs gross amounts.
Payroll Calculator
Payroll calculator online: basic payroll and withholding checks.
Contribution Checker
Contribution calculator: amount from base and percentage (e.g. pension, social).
Limit Checker
Limit checker: general and per-row limits; remaining or excess per row and total.
Balance Sheet Consistency Checker
Balance sheet checker: verify Assets = Liabilities + Equity.
Accounting Period Validator
Accounting period validator: check period validity (start ≤ end) and length in days.
Fiscal Year Checker
Fiscal year calculator: get fiscal year label from date and FY start month (e.g. April = 4).
Assets/Liabilities Validator
Assets liabilities validator: check balance equation and line-item sums vs stated totals.
Cutoff Error Detector
Cutoff error detector: find transaction dates outside the reporting period.