installmentInformation. monthlyInterestRate {#installment-info-monthly-interest-rate}
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Monthly interest rate.  
This field is available only for two kinds of installment payments on the `Visa Platform Connect` processor:

* Crediario with Visa in Brazil: this field is included in the authorization response for the Crediario eligibility request when the issuer approves the customer's request for Crediario installment payments.
* Mastercard in all countries except Croatia, Georgia, and Greece.

**Example:** A value of `1.0` specifies 1%.  
**Example:** A value of `4.0` specifies 4%.  
**Brazil**  
The value for this field corresponds to the following data in the TC 33 capture file:

* Record: CP01 TCR9
* Position: 144-150
* Field: Monthly Interest Rate

**Other Countries**  
The value for this field corresponds to the following data in the TC 33 capture file:

* Record: CP01 TCR5
* Position: 41-45
* Field: Mastercard Interest Rate

Specifications {#installment-info-monthly-interest-rate_Specifications}
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* **Data Type:** String
* **Data Length:** 7

Mapping Information {#installment-info-monthly-interest-rate_Mapping}
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* **REST API Field:** installmentInformation.monthlyInterestRate
* **SCMP API Field:**
  * auth_installment_monthly_interest_rate
  * installment_monthly_interest_rate
* **Simple Order API Field:** installment_monthlyInterestRate