This study is an empirical examination of the personal discount rates used by teenagers and adults. The participants answered a time-preference questionnaire and were asked about the bank interest paid for deposits. The results demonstrate that teenagers have a very high personal discount rate in comparison to adults. In addition, we found that receiving a regular allowance increases the teenagers'willingness to wait. Our results indicate that the influence of teenagers' poor financial knowledge, which ought to increase the personal discount rate, is stronger than the effect of their safety net that should reduce the personal discount rate.