Top-ups & rollover

Buying extra CU; subscription rollover and forfeiture rules.

When you need more CU than your monthly allowance provides, you have two options: rollover from a previous month (automatic, up to the carry cap) or Top-Ups (pay-as-you-go).

Rollover (automatic)

Unused subscription CU rolls into the next month, up to a 2× cap.

Example on Starter (500 CU/month):

  • Month 1: you use 200 CU. Remaining 300 CU rolls to Month 2.
  • Month 2: starts with 500 (allowance) + 300 (rollover) = 800 CU available. Carry cap is 1,000, so this is fine.
  • Month 2: you use 100 CU. Remaining 700 CU + Month 3's 500 = 1,200 — but carry cap is 1,000, so 200 CU forfeit at Month 3 start.

The cap exists to prevent indefinite accumulation; if you have sustained underuse, downgrade your plan rather than accumulating forever.

Top-Ups (manual)

If you need more CU mid-month, buy a Top-Up:

SKUPriceCUEffective rate
Small$20134 CU$0.149 / CU
Medium$50367 CU$0.136 / CU (10% bonus)
Large$2001,613 CU$0.124 / CU (20% bonus)

Top-Ups have these properties:

  • Sticky — they do not expire month-to-month
  • Burn order — your subscription CU burns first; Top-Up CU burns after subscription is empty
  • 12-month expiry — each Top-Up purchase is valid for 12 months from the date you bought it
  • 90-day grace after cancellation — if you cancel your subscription, Top-Up CU remains available for an additional 90 days
TIP
Buy the larger SKUs if you're a heavy user. The 20% bonus on the Large top-up brings the effective rate down meaningfully.

Subscription cancellation

If you cancel a paid plan:

  • Access continues until the end of the current billing period
  • Rolled-over subscription CU is forfeited at period end (it's attached to an active subscription, which no longer exists)
  • Top-Up CU follows the 12-month-from-purchase + 90-day-from- cancellation rule (whichever expires later)

Plan changes mid-month

When you upgrade or downgrade mid-period, Stripe handles proration. The CU allowance is recalculated on next billing cycle; mid-cycle upgrades immediately raise your carry cap but do not add CU to the current period.

Founder / Comp accounts

A small number of accounts (currently: NeuronKite's own internal testing) have unlimited CU. These accounts have a NULL wallet balance sentinel and do not run against the CU model. You'll know if you're on one of these accounts (you applied directly).

Next

Refund policy →