Monthly Retainer Invoicing: Software Evaluation Checklist
Source: https://www.getinvoiceagent.com/comparisons/best-invoicing-software-for-monthly-retainers
Reviewed: 2026-10-01 | Owner: InvoiceAgent editorial team

Use this worksheet to evaluate your own billing workflow. The source comparison is desk research from official documentation and InvoiceAgent product code, not a hands-on test of competing products. Check current plan, regional and payment-provider limits before choosing.

YOUR RETAINER
Client / service period: ____________________
Fixed fee / currency: ____________________
Approved extras this cycle: ____________________
Recurring send day / weekend rule: ____________________
Agreed payment terms / due date: ____________________
Reminder dates: ____________________
Who approves changes / records payment: ____________________

EVALUATE EACH CANDIDATE
Software / plan / date checked: ____________________
Subscription, tax and payment-processing costs: ____________________
Client and invoice limits: ____________________
[ ] Recurring invoice generation matches our calendar
[ ] Draft review or automatic delivery fits our approval process
[ ] One-off extras do not repeat next month
[ ] Preview and actual PDF checked with a recipient we control
[ ] Payment collection is separate from invoice delivery
[ ] Saved payment methods and automatic charges reviewed
[ ] We know how to stop the next invoice and any recurring charge
[ ] Payment status and reminder stopping behavior checked
[ ] Export and cancellation options reviewed
Remaining manual work / owner: ____________________
Decision / next check date: ____________________

ILLUSTRATIVE DATE CHECK
October support $1,200 + approved extra $180 = $1,380 USD.
Send October 30, 2026. With 14-day terms, due November 13.
An overdue reminder 3 days after due falls on November 16; another 4 days later falls on November 20.
This is a calendar example with no tax or currency conversion, not a real invoice, delivery or payment result. Inspect the next cycle to remove the one-off extra.

OFFICIAL REFERENCES
Zoho Invoice pricing: https://www.zoho.com/invoice/pricing/
Zoho recurring preferences: https://www.zoho.com/us/invoice/help/recurring-invoice/recurring-invoice-preferences.html
FreshBooks recurring templates: https://support.freshbooks.com/hc/en-us/articles/222843308-How-do-I-create-a-recurring-template
InvoiceAgent pricing: https://www.getinvoiceagent.com/#pricing

NEXT STEPS
Plan the dates: https://www.getinvoiceagent.com/tools/recurring-invoice-date-planner
Review the invoice: https://www.getinvoiceagent.com/features/invoice-preview-and-test-send
Evaluate one monthly billing cycle: https://www.getinvoiceagent.com/retainer-pilot
The InvoiceAgent retainer pilot offers 30 days to new accounts; it does not extend an existing account's trial.