Paid-up Value, Surrender Value and finally Loan Value can be calculated for any sum assured, for any year and for any type of policy and any year.

To get the loan value, one should know the surrender value, which is dependent on paid-up value of the policy. These can be obtained using the below formula

Paid-up Value = [ (No of years premium paid) * (SA) / (Policy Term) ] + [ (Bonus) * (SA) / (1000) ]
Now that we have paid-up value, we can next calculate surrender value

Surrender Value = [ (Surrender Value Factor) * (Paid-up Value) / (100) ]
Surrender value factor varies for each policy. Once you have surrender value, its easy to calculate loan value.

Loan Value = 90% of Surrender Value (Approx)