How this calculation works
Add guest count × per-guest cost to your fixed quotes, then add the contingency percentage to the subtotal. Subtract available funds and divide any positive gap by the months remaining, without assuming interest.
A worked example
R100 000 quoted costs with 10% contingency need R110 000. R50 000 available leaves R60 000, or R5 000 monthly over a year.
Assumptions & limitations
- All starting costs are examples, not South African vendor averages. Quotes may exclude VAT, service fees or gratuities; enter the full payable amounts. No debt, savings interest or unconfirmed gifts are assumed.
