Is there any impact on amount of TDS if a person does not have a PAN card?

As per the provisions of Income Tax Act, 1961, if payee does not furnish his PAN to the payer, the rate of TDS will be 20% or higher instead of normal TDS rates which are usually 10% or lower in all cases except for salary. 

Further, you may face problems in claiming TDS in the absence of a PAN Card because the amount will not get reflected in Form 26AS.