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Fixed pricing means customers pay the same amount every billing period, regardless of how much they use your product. It’s the most common model for SaaS subscriptions.

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When to Use Fixed Pricing

  • Your product has predictable value delivery (e.g., a project management tool)
  • You want simple, predictable revenue
  • Your customers prefer budget predictability

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Creating a Fixed Plan

curl -X POST https://api.fluxrate.co/api/v1/plans \
  -H "Content-Type: application/json" \
  -H "Cookie: access_token=<token>" \
  -d '{
    "name": "Starter",
    "lookup_id": "starter",
    "type": "FIXED",
    "billing_interval": "month",
    "currency": "USD"
  }'

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Adding a Fixed Charge

After creating the plan, add a fixed charge: 
curl -X POST https://api.fluxrate.co/api/v1/plans/<plan_id>/charges \
  -H "Content-Type: application/json" \
  -H "Cookie: access_token=<token>" \
  -d '{
    "type": "FIXED",
    "unit_price": 49.00,
    "display_name": "Monthly subscription"
  }'

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Multi-Interval Pricing

You can offer the same plan at different billing intervals with different prices to incentivize annual commitments:
IntervalPriceEffective Monthly
Monthly$49$49.00
Yearly$470$39.17 (20% discount)
Create a separate plan with billing_interval: "year" and a charge of $470.

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Trial Periods

Add a free trial to a fixed plan: 
{
  "name": "Pro",
  "type": "FIXED",
  "billing_interval": "month",
  "currency": "USD",
  "trial_days": 14
}
During the trial period, the subscription status is TRIAL and no invoice is generated. After the trial ends, the subscription becomes ACTIVE and billing begins.

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Example: SaaS Starter Plan

Starter Plan ($29/month)
├── Features
│   ├── Projects (custom) → "5 projects"
│   ├── Team Members (custom) → "3 seats"
│   └── API Access (switch) → disabled
└── Charges
    └── Monthly Fee → $29.00 (FIXED)