Membership Invoicing App for Associations: Renewals, Pro-Rating and Events

A membership association invoicing app sends the right renewal invoice to every member at the right time, pro-rates people who join mid-year, and keeps event fees and sponsorship apart from dues. Describe your tiers and renewal rule to Mythex and it builds the app on a real database with invoice PDFs, payment status and reminders.

Who it's for

Associations that build hundreds of renewal invoices in a word processor each autumn, argue internally about how to charge mid-year joiners, and mix conference income with membership dues in one spreadsheet.

What you can build

Annual renewal invoices with tier and period covered
Organisational invoices listing named individuals
Pro-rated fees for mid-year joiners
Event fees and sponsorship as separate invoices
Online payment and payment status
Overdue renewals list with reminders

Choose one renewal rule

Decide whether renewals follow a fixed annual date or each member's join date, and apply it to everyone. A fixed date simplifies admin and reporting; anniversary renewals spread cash and workload across the year. Mixing both is what causes confusion. Tell Mythex the rule and it generates invoices for every membership due in the next cycle, with the tier and period on each.

Fixed date or anniversary, not both
Batch generation per cycle
Tier and period on each invoice

Pro-rating mid-year joiners

With a fixed renewal date, someone joining in September should not pay a full year for three months. Pick a simple rule, such as pro-rating by quarter, and apply it automatically at join. The invoice shows the period covered so the member understands the amount.

Organisations, events and sponsors

Organisational memberships get one invoice listing the named individuals covered, with the purchase order number if they need one. Conference tickets, sponsorship packages and exhibitor fees are invoiced separately from dues, so membership income and event income can be reported apart, which boards and auditors usually want.

Named individuals on organisational invoices
PO numbers where required
Event and sponsor income kept separate

Mistakes to avoid

Do not keep lapsed members' benefits running while their invoice is unpaid indefinitely; set a grace period and then pause directory listing and member prices. Do not re-key payments from the bank by hand if online payment is possible. And check the tax treatment of dues and events where you operate with your accountant.

A prompt to start from

Create an invoicing app for my membership association. Renewals are on 1 January; generate invoices in November for every membership with tier and period covered. Mid-year joiners are pro-rated by quarter. Organisational invoices list named individuals and a PO number. Conference tickets, sponsorship and exhibitor fees are separate invoices. Add online payment, payment status, reminders and a 30-day grace period after which directory listings pause.

Questions

Can it generate all renewal invoices at once?

Yes. On the date you choose, it creates invoices for every membership due, with the right tier and period.

Can it pro-rate new members?

Yes. Set a rule, such as by quarter or month, and the join invoice is calculated automatically.

Can members pay by card?

Yes, through a payment provider such as Stripe connected with your own account. Payments mark invoices paid.

Do I need to code?

No. Describe your tiers and rules in chat and Mythex builds the invoicing.

What does it cost?

Build and publish on the Free plan without a card. Pro is $25/month and adds a custom domain, code editing and export.

Templates to start from

Account Health Dashboard Template — Renewal view with risk scores
AI Trip Planner Template — Chat itineraries with billing-ready UI
Invoice Generator Template — Canvas invoicing with PDF export
Cloud Storage SaaS Template — Marketing site, billing UI, and 2FA
Trade Publication Template — Research reports, jobs, memberships