Marking non-billable expenses as reimbursed or paid

Marking non-billable expenses as reimbursed or paid

The subject line says it all. What's the recommended way to do this? I reimburse my billable and non-billable expenses when an invoice gets paid to keep the reporting clean, but I'm not seeing an easy way to say, in Zoho Books, "these non-billable expenses are now paid." Reporting becomes difficult when I have months of non-billable expenses which have actually been paid.