ILLERBiller is free up to a daily limit, then billed through prepaid bill credits -- there is no monthly subscription.
Every outlet gets 100 bills a day, free, forever -- no credit card required. The count resets at midnight IST. Once you're past today's free 100, creating another bill spends one prepaid bill credit instead (1 credit = 1 bill).
From Outlet -> Buy credits (or the "Upgrade" prompt shown once you're close to today's free limit), you can top up a prepaid wallet. Credits are yours for lifetime -- they never expire, and unused credits carry over indefinitely, even if you stop billing for a while.
The current packs:
| Pack | Credits | Price |
|---|---|---|
| Starter | 2,000 | ₹199 |
| Growth (Recommended) | 5,000 | ₹449 |
| Scale | 10,000 | ₹799 |
| Limited introductory offer | 50,000 | ₹1,899 (regular price ₹4,499) |
The 50,000-credit pack is a limited-time introductory offer, capped to the first 100 buyers -- once the cap is reached (or the offer ends), the pack reverts to its regular ₹4,499 price. Every pack that's currently discounted shows its original price struck through alongside the %-off, so what you see on the Credits page is always exactly what you'll be charged.

Checkout runs through Razorpay. Once your payment is confirmed, the credits land in your wallet immediately -- no waiting, no manual approval.
A confirmed credit purchase also shows up automatically in your Expense report (category "Software / Biller credits", dated to the payment) -- you don't need to add it yourself.