Salesforce: Opportunity Close Date on Lead Convert

When you convert a Lead into Account, Contact and Opportunity. Opportunity Close Date cannot be set from the Lead conversion field mapping.

• If you are not using custom fiscal years, the Close Date of the newly created opportunity is automatically set to the last day of the current fiscal quarter.
• If you are using custom fiscal years, the Close Date is the last day of the current fiscal period. 
• If you are using custom fiscal years and a fiscal year has not been defined for the current date, the Close Date is the end of the current calendar quarter.

Use Case 1: set Opportunity Close Date = 90 days from Lead conversion date

Solution:

1. Create a Formula Field in Lead

• Field Label = Now
• Formula Return Type = Date/Time
• Formula = NOW()

2. Create a Date/Time Field in Opportunity

• Field Label = When Converted
• Field Type = Date/Time

3. Map Field in Lead Conversion

• Lead Now = Opportunity When Converted

4. Create Workflow in Opportunity

• Object = Opportunity
• Evaluate the rule when a record is "Created"
• Rule Criteria - Opportunity: When Converted not equal to null 

5. Create Field Update Action in Opportunity for Workflow (4)

• Object = Opportunity
• Field to Update - Opportunity: Close Date
• Formula Value = Today() + 90

Use Case 2: set Opportunity Close Date to the first day of the next fiscal quarter.

Solution: Follow step 1-4 above:

5. Create Field Update Action in Opportunity for Workflow (4)

• Object = Opportunity
• Field to Update - Opportunity: Close Date
• Formula Value = CloseDate + 1

Reference: Lead Conversion Mapping