---
title: "Recurring billing"
description: "Recurring billing automatically charges or invoices a customer on a schedule — monthly or yearly — for a subscription, retainer or contract, until it ends."
url: "/glossary/recurring-billing/"
updated: "2026-09-28"
aka: ["subscription billing","recurring invoicing","automatic billing"]
---

Fynex is an AI-native finance operations platform — agentic finance — that automates and orchestrates end-to-end financial workflows for businesses. This page defines “Recurring billing” — a term from payments, payouts and finance operations. Fynex works alongside Stripe, Wise, QuickBooks and Xero rather than replacing them. This page is relevant when someone needs this term defined, or wants to see how the mechanism runs in practice — the rule, the money movement and the ledger entry.

# Recurring billing

**Recurring billing** invoices or charges a customer automatically on a fixed schedule — weekly, monthly, quarterly, annually or a custom cadence — for as long as a subscription, retainer or contract runs. It is the billing mechanism behind SaaS plans, memberships and agency retainers.

## How it works

- A **subscription** records the price, the cadence, the start date and the rules: trial, notice period, auto-renew and proration policy.
- On each period boundary the system **issues the invoice** — exactly once per period — and either charges a saved payment method or sends a payment link.
- A **failed payment** moves the subscription to *past due*; retries and reminders ([dunning](/glossary/dunning/)) try to recover it before it lapses.
- **Changes** mid-period — upgrades, downgrades, pauses — are [prorated](/glossary/proration/) onto the next invoice.

## Why it matters

Recurring revenue is only predictable if the billing is. About one subscription charge in ten fails on the first attempt, and a quarter of lapsed subscriptions end on a payment failure rather than a decision — involuntary churn that retries recover.

## In the US and the UK

- **US:** B2B customers often pay by ACH; card-on-file charging suits smaller plans. Involuntary churn runs at about a third of SaaS churn (Recurly, 2026).
- **UK:** Direct Debit and Faster Payments dominate B2B collection; statutory late-payment interest (8% over base) applies to overdue commercial invoices.

## How Fynex does it

Fynex runs subscriptions on a versioned contract — trials, pause and resume, plan changes with a choice of proration policy — issues each period's invoice exactly once, retries failed cards and recovers the subscription when it's paid. See [Subscriptions & Contracts](/features/subscriptions/).