Rekenbox — By Winstwaker
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Rekenbox · 2026

Need a forecast? Start with your accounts.

Read your accounting export and forecast income, costs and profit for the next 12 months.
Guide & example ↓

Read your XAF, classify accounts and preview key figures for free. The complete forecast report with monthly tables costs €19 including VAT.

Preview your key figures for free. Then buy the complete PDF report with tables and supporting details, or use your Pro subscription. What costs money, and why?

1. Read your accounting export

Export an Auditfile Financieel (XAF) from your accounting software. No connection setup needed.

Understand your result

How this tool works

The forecast maker totals income and costs from your own postings. The calendar-month average is the baseline for 3, 6 or 12 future months. Set expected income and cost changes and review account classification. The forecast starts in the month after your reference period. This is an adjustable first draft, not a prediction of seasonality or a cash flow statement.

Common questions

Does this work with my accounting software?

You can import a XAF 3.0, 3.1, 3.2 or 4.0 export in EUR regardless of the vendor. Your software must support this Auditfile Financieel export. No direct connection; up to 10 MB and 1,000 ledger accounts. Review unknown account classifications yourself.

What do I get for €19?

A PDF containing the monthly forecast, historical monthly figures, account classification and assumptions. Source data can also be downloaded. Preview key figures for free; only the complete report is paid. Pro includes these reports. Acceptance by a bank or lender is not guaranteed.

Which details do you need?
  • Choose a file — XAF 3.0, 3.1, 3.2 or 4.0 in EUR · up to 10 MB.
  • Reference period start
  • Last fully posted date
  • Expected income change (%)
  • Expected cost change (%)
  • Forecast horizon
  • Account classification
Assumptions and scope
  • The monthly forecast uses the average across calendar months in your selected reference period, including months without postings. A partial month counts as one month; preferably use fully posted months.
  • Your percentage change is applied once to the monthly average, not compounded each month. Seasonality, new investments and one-off items are not predicted automatically.
  • Review the suggested account classification. Income and costs follow the postings; balance sheet accounts are excluded by default. The result is not a cash flow forecast or an accountant’s assurance.

Year: 2026 · Version 2026.1

Sources for this tool
Free tools, reports and Pro →Rekenbox help →

Rekenbox is a product by Winstwaker. The tool applies a calculation model to your inputs; a result or paid report is not a personal assessment by an adviser.