Rekenbox — By Winstwaker

All tools

Calculate 20 tools

VAT calculatorAdd VAT to a price or extract it from a total.FreeProfit marginCompare profit, margin and markup.FreeBreak-even revenueHow many sales cover your fixed costs?FreeLoan repaymentMonthly payments and a complete repayment schedule.FreeMargin scheme VATVAT on the positive margin of an eligible used item.FreeDepreciationBook value, residual value and annual depreciation.FreeInvestment deductionSmall-scale investment deduction for 2026.FreeVAT rounding differenceCompare VAT rounded per good or service with VAT rounded on the total.FreeIncome taxFrom sole trader profit to income tax, healthcare contribution and net income.FreeProvisional tax assessmentHow much remains to reserve for income tax and healthcare contribution?FreeFreelance hourly rateA rate covering your net income, costs and tax.FreeGross to net salaryNet salary and holiday pay using payroll tax tables.FreeEmployer costsGross salary plus holiday allowance and employer contributions.FreeSole trader or limited companyCompare net income, tax and retained profits.FreeDirector salary and dividendCalculate salary, corporate tax and dividend in one overview.FreeHoliday payGross holiday allowance and an estimated net payment.FreeMinimum wageMinimum hourly wage and minimum pay for hours worked.FreeCompany car taxTaxable company car benefit and estimated net effect.FreePrivate or business carCompare annual car costs as a sole trader.FreeStatutory interest and collection costsInterest by period and collection cost calculation.Free

Create 10 tools

Create invoiceEnter the details and download your PDF document.FreeCreate credit noteEnter the details and download your PDF document.FreeCreate quoteEnter the details and download your PDF document.FreePayment reminderCreate a reminder for an unpaid invoice.FreeTimesheetRecord time by date and project, with totals and export.FreeMileage logTrips, odometer readings and business mileage in one export.FreeCash bookCash receipts, payments and running balance.FreeSEPA payment fileCreate an XML file for euro transfers within the EEA.FreeForecast from XAFRead your accounting export and forecast income, costs and profit for the next 12 months.Financial overview from XAFCombine income, costs, profit and ledger balances in one clear report.

Check 8 tools

XAF CheckerCheck auditfiles for balances, dates, VAT and references.FreeCheck UBL invoiceInvoice data, lines, VAT and totals from UBL XML.FreeCheck invoice amountsCheck entered invoice amounts, VAT and duplicate invoice numbers.FreeCheck IBANCheck country code, length and checksum.FreeCheck VAT numberCheck the format of a European VAT number.FreeNormalise bank CSVConvert a bank export to consistent columns and dates.FreeCheck trial balanceCheck debit/credit, duplicate accounts and balance differences.FreeCheck payroll calculationCompare a regular payslip with the 2026 calculation table.Free