Recurring billing software for B2B SaaS
Recurring billing software invoices your customers automatically on a schedule — monthly, quarterly or annually — and keeps every invoice right as plans, seats and usage change. It works out what each customer owes, bills it, collects it and hands finance the numbers.
Bunny is SaaS billing, CPQ and RevOps for B2B SaaS. It runs card payments and net-30 invoices side by side, prorates every mid-term change, and turns signed quotes straight into subscriptions, so your recurring billing matches the contract.
Recurring billing software vs recurring payment software
People search for both, and plenty of tools call themselves either. The difference is what the software knows. Recurring payment software knows an amount and a date. Recurring billing software knows the contract, so it can work out what the amount should be.
| Question | Recurring payment software | Recurring billing software |
|---|---|---|
| What it does | Charges a stored card or bank account a set amount on a schedule | Calculates what each customer owes each period, invoices it and tracks payment |
| Handles price changes | You update the amount | Seats, upgrades and usage change the invoice, prorated |
| Invoices on terms | Rarely; built around card payments | Net-30 invoices with PO numbers alongside card payments |
| Feeds finance | A list of successful charges | Invoices, receivables, accounting sync and revenue reports |
| Fits | Memberships, donations, one-plan products | B2B SaaS with plans, seats, usage and negotiated contracts |
You still need a payment processor — recurring billing software sits on top of one. Bunny collects card and bank payments through your payment gateway, and records payments made by bank transfer or check against the invoice. If your product-led revenue already bills through Stripe, Bunny Sidecar lets it keep doing that.
What Bunny’s recurring billing automates
Set up the price list once. From then on, every invoice, renewal, reminder and journal entry runs from the subscription.
Any billing schedule
Monthly, quarterly, semi-annual or annual charges. Recurring fees bill in advance, usage in arrears, one-time fees on the next invoice.
Proration and co-terming
Upgrades, downgrades and seat changes are prorated, and new subscriptions co-term onto the account’s billing date.
Cards, ACH and invoices on terms
Collect card and bank payments through Stripe, or send net-terms invoices with PO numbers and record wire and check payments against them.
Fewer invoices per customer
Consolidated billing rolls mid-cycle charges into the next bill run, so a customer who adds seats twice in a month still gets one invoice.
Sales tax and VAT
Calculate tax with Avalara AvaTax or Kintsugi, or flat-rate VAT with EU VAT number validation.
Emails that send themselves
New invoices, failed payments, overdue reminders, renewal notices and trial reminders, all from built-in workflows you can edit.
A portal customers actually use
Customers update payment details, pay invoices, download history and change their plan in the self-service portal, even on negotiated pricing.
Every currency and entity
With the Advanced Billing add-on, bill in any ISO currency from multiple legal entities, with their own branding, invoice numbering and fiscal year.
Books that close faster
Journal entries sync to QuickBooks Online and Xero, and revenue recognition schedules build from the same invoices.
Pricing that changes with consumption? See usage-based billing. Comparing platforms? Start with how to choose SaaS billing software.
The challenges of recurring billing for finance teams
Recurring billing looks simple until the first contract changes halfway through a term. These are the six problems that land on finance, and what good recurring billing software does about each.
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Mid-term changes break the invoice
Seats added in month four of an annual plan need a prorated charge now and a new amount at renewal. Calculated by hand, that’s where invoice errors and credit notes come from. Bunny prorates every change and co-terms new subscriptions onto the existing billing date.
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The contract and the billing system disagree
When deals are signed in one tool and rekeyed into billing, discounts and terms go missing. In Bunny the accepted quote becomes the subscription, so the invoice is generated from the deal that was signed. See quote-to-cash.
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Usage arrives after the fact
Recurring fees bill in advance, usage bills in arrears, and customers want one invoice. Bunny puts both on the same subscription and invoice. See metered billing.
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Renewals slip past at the old price
An uplift nobody remembered to apply is revenue you never invoice. Bunny renews evergreen subscriptions automatically and applies the renewal pricing set on each price list. See renewal management.
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Overdue invoices need chasing
B2B customers pay on terms, and someone has to follow up. Bunny sends reminder emails as invoices go past due, with a link to pay. See dunning management.
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Month-end close runs on spreadsheets
Deferred revenue, MRR and receivables rebuilt by hand each month. Bunny syncs to QuickBooks Online and Xero and builds revenue recognition schedules from the same invoices.
Compare Bunny with other billing platforms
Weighing up more than one option? Here is how Bunny stacks up against the other platforms B2B SaaS teams shortlist most often.
- Bunny vs Chargebee A broad subscription suite. Bunny is built around the negotiated deal.
- Bunny vs HubSpot A powerful CRM that stops short of being a billing system.
- Bunny vs Maxio Capable, but assembled from SaaSOptics, Chargify and RevOps.io rather than built as one platform.
- Bunny vs Recurly Built for consumer subscriptions rather than sales-led B2B deals.
- Bunny vs Stripe Excellent for self-service checkout, thin on complex B2B pricing.
- Bunny vs Zuora Enterprise-grade, with the cost and 6–12 month implementation to match.
The RevOps expert your team never had.
- Type "send upgrade quotes to all starter plan accounts" — done in seconds
- Know which renewals need you this month, while there is still time to do something about it
- Find every overdue invoice in one question, instead of one account at a time
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