Linking a variation to an allowance allows you to track the remaining amount of the allowance and create a variation for the client should the value exceed the allowance amount.
To link an allowance to a variation, first navigate to the relevant variation you want to link.
Under Allowance Allocation, click Add Allowance, and a drop-down of available allowances will appear, allowing you to select which allowance/allowances you want to link to the variation.
If the variation exceeds the allowance, it will be reflected in the job budget.
If this is the only variation or last variation to be linked to the allowance, and the total variations linked to the allowance are less than the allowance, you can choose to credit the remaining amount to the client. Click on Credit Remaining under the allowance allocation section. This will result in a negative $ variation showing on the job budget. When issuing an invoice to the client, you can select this negative $ variation, and it will offset other items on the invoice.