The Company accounts for employee and non-employee stock options under ASC 718 and ASC 505, whereby option costs are recorded based on the fair value of the consideration received or the fair value of the equity instruments issued, whichever is more reliably measurable. Unless otherwise provided for, the Company covers option exercises by issuing new shares.

The Company's stock option activity is described below.

Non-employee stock options

At the beginning of 2012, the Company had 22,500 options outstanding for shares in Transbiotec – CA. The fair value of the option grants was estimated on the date of grant using the Black-Scholes option pricing model with the following assumptions: risk free interest rate of 2.67%, dividend yield of 0%, expected life of five years, volatility of 100%. During the year ended December 31, 2012 no options were exercised or expired, leaving a December 31, 2012 outstanding balance of 22,500 non-employee stock options, exercisable at prices from $0.10 - $0.15 per share with the option terms expiring from January 2012 through January 2015. All of these options are for the stock of TransBiotec - CA. During the year ended December 31, 2014, 20,000 options were exercised, leaving a December 31, 2014 outstanding balance of 2,500 non-employee stock options, exercisable at $0.10 per share with the option terms expiring in January 2015. During the year ended December 31, 2015, no options were exercised as all outstanding options expired in January 2015 leaving no outstanding balance of non-employee stock options in the stock of Transbiotec-CA at December 31, 2015. During the three months ended March 31, 2016, no options were exercised as all outstanding options expired in January 2015 leaving no outstanding balance of non-employee stock options in the stock of Transbiotec-CA at March 31, 2016

During 2012 the Company granted 29,678 stock options for shares in Transbiotec - DE. The fair value of the option grants was estimated on the date of grant using the Black-Scholes option pricing model with the following assumptions: risk free interest rate of 0.8%, dividend yield of 0%, expected life of five years, volatility of 189%. No options were exercised or expired, leaving a December 31, 2012 outstanding balance of 29,678 options for Transbiotec – DE. The Company incurred and recorded compensation expense under these stock option grants of $4,042 in 2012, vested immediately.

During 2013 the Company granted 5,321,735 stock options for shares in Transbiotec - DE. The fair value of the option grants was estimated on the date of grant using the Black-Scholes option pricing model with the following assumptions: risk free interest rates between 7% - 14%, dividend yield of 0%, expected life of five years, volatility between 179% - 186%. No options were exercised or expired, leaving a December 31, 2013 outstanding balance of 5,351,413 options for Transbiotec – DE. The Company incurred and recorded compensation expense under these stock option grants of $145,997 in 2013, vested immediately.

During 2014 the Company granted 8,403,633 stock options for shares in Transbiotec - DE. The fair value of the option grants was estimated on the date of grant using the Black-Scholes option pricing model with the following assumptions: risk free interest rates between 1.55% - 1.77%, dividend yield of 0%, expected life of five years, volatility between 147% - 178%. No options were exercised or expired, leaving a December 31, 2014 outstanding balance of 13,755,046 options for Transbiotec – DE. The Company incurred and recorded compensation expense under these stock option grants of $69,886 in 2014, vested immediately.

During the year ended December 31, 2015, the Company granted 16,282,995 stock options for shares in Transbiotec - DE. The fair value of the option grants was estimated on the date of grant using the Black-Scholes option pricing model with the following assumptions: risk free interest rate between 1.37% - 1.68%, dividend yield of 0%, expected life of five years, a volatility range of 172% - 174%. No options were exercised or expired, leaving a December 31, 2015 outstanding balance of 30,038,041 options for Transbiotec – DE. The Company incurred and recorded compensation expense under these stock option grants of $27,731 during the year ended December 31, 2015, vested immediately.

A summary of stock option activity for California is as follows:

A summary of stock option activity for Delaware is as follows:

Following is a summary of the status of options for Delaware outstanding at March 31, 2016:

Employee stock options

The parent company had no outstanding employee stock options.

Stock subscriptions received

At March 31, 2016 and December 31, 2015, the Company converted certain accounts payable into common shares which amounts to $31,569 for 1,203,887 common shares to be issued, and $55,868 for 6,049,578 common shares to be issued, respectively.

At March 31, 2016 and December 31, 2015, the Company converted certain notes payable into preferred shares which amounts to $14 for 1,388,575 preferred shares to be issued.