Zakah on accumulated money

I'd like to ask a question since you helped me the last time. I've been keeping money from last year; each month I put part of my money aside and now a year later, I'd like to know If I have to pay the ZAKAH on the amount I have a year later or is there another calculation and is it still 2.5%? Who is eligible to receive the Zakah?

Praise be to Allah, the Lord of the Worlds, and blessings and peace be upon our Prophet Muhammad and upon all his Family and Companions.

If the amount of gold has reached 20 mithqal (85 grams of pure gold) then one should pay the ½ mithqal as Zakah. If the amount of silver has reached 200 Dirhams (642 grams) one should pay five Dirhams as Zakah. This is called the Nisaab i.e the minimum of one's holdings liable to Zakah. Anyone who has more than this is obliged to pay zakah.       When the money is equivalent to the value of 85 grams gold you should pay Zakah. The monetary value of gold, silver etc. on which Zakah is due can be found by consulting the financial section of the daily newspaper or contacting a local bank, especially on the day the Zakah is due. You have to pay Zakah of your money with two conditions:1- It should complete the Nisaab. 2- One Islamic year (lunar) should be passed after possessing the money.
As for money you earn gradually, it is better to pay the Zakah after completing a year beginning from the time of first amount you have obtained. This is better for you and better for needy people. If you maintained a calculation and paid the Zakah of every portion on its time, it will be lawful too. As long as this money is gradually growing up, you may make a specific month for paying Zakah, suppose you make the month of Ramadan a month for you to pay the Zakah. Every year when Ramadan comes, you pay the Zakah of all your money.
Allah has mentioned the categories that are eligible for receiving Zakah. Allah says: (interpretation of the meaning): "As-Sadaqât (here it means Zakâh) are only for the Fuqarâ(poor), and Al-Masâkin(the needy) and those employed to collect (the funds); and for to attract the hearts of those who have been inclined (towards Islâm); and to free the captives; and for those in debt; and for Allâh's Cause (i.e. for Mujâhidûn - those fighting in the cause of Allah), and for the wayfarer (a traveller who is cut off from everything); a duty imposed by Allâh. And Allâh is All-Knower, All-Wise."

Allah knows best.