Here is the summarized information on annual I-140 and I-485 percentage approval rate for different service centers. This data is solely taken from published data on website - http://www.immigrationwatch.com/uscis-processing-statistics.html ,and is just tabulated and presented here in different format. We have updated our green calculator to include I-140 conversion rate based on this data, Green Calculator, thus will not assume 100% I-140 approval rate for approved PERMs . This conversion rate is only used for calculation for any cut-off dates which are beyond July 2007. For any priority date which is after or on October of the particular year, calculator will use the percentage approval rate value from the next year, thus assuming PERM approval time of 90 days.
Tabulated list below also considered volume of applications received at NSC and TSC in order to arrive at average I-140 and I-485 approval percentage, and succesively used those values to calculate 'rolling successive percentage'. Green Card calculator will use 'rolling successive average' to arrive at reduced number of applicants before your priority date to calculate estimated wait time. System will recommend I-140 conversion rate for each priority date.
I-140 conversion rate is also an 'USER ENTERED' entry where you can input values in 'Percentage' only. For e.g. If you will assume percentage as '75', entered value should be '0.75' or '75%'.
I-140 and I-485 Approval Rate for diffferent Service Centers
 |
| Click Picture to Enlarge |
 |
| Click Picture to Enlarge |