Well, the price for overstay depends on the length of your overstay. You should go to the office of the Direccion General de Migracion, or you can pay a fee at the airport. Nevertheless, we should say that the fees are not high. So, let us take a look at a small list with the prices that you will need to pay depending on the length of your stay.
1 day – 3 months will cost you RD $2 500
3 months – 9 months will cost you RD $4 000
9 months – 12 months will cost you about RD $5 000
12 months – 18 months will cost you RD $6 500
Note that prices are in Dominican Pesos (RD$) for better understanding. And Dominican Peso is not equal to US Dollar. You can use this page as a currency converter and check exchange rates for Dominican Peso.