# Volume pricing model for charges

The volume pricing model allows you to define multiple tiers, similar to the graduated pricing.
The unit price then depends on the total volume of units.

For instance:

• Tier 1: 0 to 100 units - \$4 per unit
• Tier 2: 101 to 500 units - \$3 per unit
• Tier 3: 501+ units - \$2 per unit

If at the end of the billing period the total volume is 400 units, then the second tier will apply and the charge will be 400 x \$3 = \$1,200.

It would be cool if there were two options. The first one is the same as your example.

If at the end of the billing period the total volume is 400 units, then the second tier will apply and the charge will be 400 x \$3 = \$1,200.

And in the second one

For 400 units. Charge the first 100 units as \$4/unit & the left as the second tier. The charge will be 100 * \$4 + 300 * \$3 = \$1300

Hello @PJijin and welcome to this forum!

What you described is what we call the graduated pricing model. This feature is already available, here’s the corresponding documentation.

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