Use this Child Status Protection Act (CSPA) calculator to estimate a beneficiary’s CSPA age and check whether the one-year “sought to acquire” timing appears to be met.
What is a CSPA calculator?
A CSPA calculator helps estimate a child beneficiary’s “protected age” under the Child Status Protection Act. In many family-based and employment-based immigration cases, a child can lose eligibility by turning 21 before a visa is available. CSPA can reduce (or “freeze”) that age for immigration purposes.
The core idea is simple: you start with the child’s biological age on the visa availability date, then subtract the amount of time the petition was pending with USCIS. If the resulting CSPA age is under 21, the beneficiary may remain classified as a child, assuming other requirements are met.
How CSPA age is calculated
The standard formula used in most preference-category cases is:
CSPA Age = Age on Date Visa Became Available − Petition Pending Time
Key date definitions
- Age on visa availability date: Time from date of birth to the date the priority date becomes current (or otherwise available under law).
- Petition pending time: Time from petition filing (receipt date) to petition approval date.
- Sought to acquire requirement: Usually, the beneficiary must seek to acquire lawful permanent residence within one year of visa availability.
How to use this CSPA calculator
- Enter the beneficiary’s date of birth.
- Enter the petition filing date and approval date.
- Enter the visa availability date.
- Optionally enter the date the beneficiary sought to acquire residence.
- Click Calculate CSPA Age to view estimated eligibility signals.
The calculator provides an estimate only. Real cases can include category-specific rules, retrogression timing issues, and fact-specific exceptions.
Worked example
Suppose a beneficiary is 21 years and 4 months old on the date the visa becomes available. If the petition was pending for 8 months with USCIS, the estimated CSPA age becomes about 20 years and 8 months. That is under 21, so the age-protection test is likely met.
Next, if the beneficiary filed a qualifying immigrant action (for example, I-485 or DS-260-based action) within one year, the sought-to-acquire requirement may also be met.
Common CSPA mistakes to avoid
- Using the wrong visa availability date.
- Using mailing date instead of receipt date for petition filing.
- Confusing petition approval date with NVC transfer date.
- Ignoring the one-year sought-to-acquire deadline.
- Assuming all categories follow identical CSPA rules.
Practical tips before filing
Keep date evidence organized
Save receipts, approval notices, visa bulletin screenshots, DS-260 timestamps, and payment records. Clear documentation matters if age-out protection is questioned.
Track deadlines early
As soon as a visa appears available, act quickly. The one-year window can pass faster than expected, especially during transitions between NVC and consular steps.
Get legal review for close cases
If your estimated CSPA age is near 21, or if your dates involve retrogression and category movement, a qualified immigration attorney can help evaluate the strongest legal position.