The zakāh rate isn't in the Qur'an — so?

۞ يَسْـَٔلُونَكَ عَنِ ٱلْخَمْرِ وَٱلْمَيْسِرِ ۖ قُلْ فِيهِمَآ إِثْمٌ كَبِيرٌ وَمَنَـٰفِعُ لِلنَّاسِ وَإِثْمُهُمَآ أَكْبَرُ مِن نَّفْعِهِمَا ۗ وَيَسْـَٔلُونَكَ مَاذَا يُنفِقُونَ قُلِ ٱلْعَفْوَ ۗ كَذَٰلِكَ يُبَيِّنُ ٱللَّهُ لَكُمُ ٱلْـَٔايَـٰتِ لَعَلَّكُمْ تَتَفَكَّرُونَ

They question thee about strong drink and games of chance. Say: In both is great sin, and (some) utility for men; but the sin of them is greater than their usefulness. And they ask thee what they ought to spend. Say: that which is superfluous. Thus Allah maketh plain to you (His) revelations, that haply ye may reflect.

يَـٰٓأَيُّهَا ٱلَّذِينَ ءَامَنُوٓا۟ أَنفِقُوا۟ مِن طَيِّبَـٰتِ مَا كَسَبْتُمْ وَمِمَّآ أَخْرَجْنَا لَكُم مِّنَ ٱلْأَرْضِ ۖ وَلَا تَيَمَّمُوا۟ ٱلْخَبِيثَ مِنْهُ تُنفِقُونَ وَلَسْتُم بِـَٔاخِذِيهِ إِلَّآ أَن تُغْمِضُوا۟ فِيهِ ۚ وَٱعْلَمُوٓا۟ أَنَّ ٱللَّهَ غَنِىٌّ حَمِيدٌ

O ye who believe! Spend of the good things which ye have earned, and of that which We bring forth from the earth for you, and seek not the bad (with intent) to spend thereof (in charity) when ye would not take it for yourselves save with disdain; and know that Allah is Absolute, Owner of Praise.

۞ وَهُوَ ٱلَّذِىٓ أَنشَأَ جَنَّـٰتٍ مَّعْرُوشَـٰتٍ وَغَيْرَ مَعْرُوشَـٰتٍ وَٱلنَّخْلَ وَٱلزَّرْعَ مُخْتَلِفًا أُكُلُهُۥ وَٱلزَّيْتُونَ وَٱلرُّمَّانَ مُتَشَـٰبِهًا وَغَيْرَ مُتَشَـٰبِهٍ ۚ كُلُوا۟ مِن ثَمَرِهِۦٓ إِذَآ أَثْمَرَ وَءَاتُوا۟ حَقَّهُۥ يَوْمَ حَصَادِهِۦ ۖ وَلَا تُسْرِفُوٓا۟ ۚ إِنَّهُۥ لَا يُحِبُّ ٱلْمُسْرِفِينَ

He it is Who produceth gardens trellised and untrellised, and the date-palm, and crops of divers flavour, and the olive and the pomegranate, like and unlike. Eat ye of the fruit thereof when it fruiteth, and pay the due thereof upon the harvest day, and be not prodigal. Lo! Allah loveth not the prodigals.

۞ إِنَّمَا ٱلصَّدَقَـٰتُ لِلْفُقَرَآءِ وَٱلْمَسَـٰكِينِ وَٱلْعَـٰمِلِينَ عَلَيْهَا وَٱلْمُؤَلَّفَةِ قُلُوبُهُمْ وَفِى ٱلرِّقَابِ وَٱلْغَـٰرِمِينَ وَفِى سَبِيلِ ٱللَّهِ وَٱبْنِ ٱلسَّبِيلِ ۖ فَرِيضَةً مِّنَ ٱللَّهِ ۗ وَٱللَّهُ عَلِيمٌ حَكِيمٌ

The alms are only for the poor and the needy, and those who collect them, and those whose hearts are to be reconciled, and to free the captives and the debtors, and for the cause of Allah, and (for) the wayfarer; a duty imposed by Allah. Allah is Knower, Wise.

خُذْ مِنْ أَمْوَٰلِهِمْ صَدَقَةً تُطَهِّرُهُمْ وَتُزَكِّيهِم بِهَا وَصَلِّ عَلَيْهِمْ ۖ إِنَّ صَلَوٰتَكَ سَكَنٌ لَّهُمْ ۗ وَٱللَّهُ سَمِيعٌ عَلِيمٌ

Take alms of their wealth, wherewith thou mayst purify them and mayst make them grow, and pray for them. Lo! thy prayer is an assuagement for them. Allah is Hearer, Knower.

وَيَوْمَ نَبْعَثُ فِى كُلِّ أُمَّةٍ شَهِيدًا عَلَيْهِم مِّنْ أَنفُسِهِمْ ۖ وَجِئْنَا بِكَ شَهِيدًا عَلَىٰ هَـٰٓؤُلَآءِ ۚ وَنَزَّلْنَا عَلَيْكَ ٱلْكِتَـٰبَ تِبْيَـٰنًا لِّكُلِّ شَىْءٍ وَهُدًى وَرَحْمَةً وَبُشْرَىٰ لِلْمُسْلِمِينَ

And (bethink you of) the day when We raise in every nation a witness against them of their own folk, and We bring thee (Muhammad) as a witness against these. And We reveal the Scripture unto thee as an exposition of all things, and a guidance and a mercy and good tidings for those who have surrendered (to Allah).

وَٱلَّذِينَ فِىٓ أَمْوَٰلِهِمْ حَقٌّ مَّعْلُومٌ

And in whose wealth there is a right acknowledged

لِّلسَّآئِلِ وَٱلْمَحْرُومِ

For the beggar and the destitute;