How Indian Numbering Works
The Indian numbering system groups digits differently from the international system. After the first three digits (hundreds), grouping is in pairs of two instead of threes.
12,34,56,789 = 12 Crore, 34 Lakh, 56 Thousand, 7 Hundred Eighty Nine
Key places: Hundred (100) · Thousand (1,000) · Lakh (1,00,000) · Crore (1,00,00,000) · Arab (1,00,00,00,000) · Kharab (1,00,00,00,00,000).
10 Lakh = 1 Million · 1 Crore = 10 Million · 100 Crore = 1 Billion · 1 Lakh Crore = 1 Trillion. Remember this and converting between systems becomes easy.
Writing Amounts on Cheques — Legal Notes
Under the Negotiable Instruments Act, 1881 (Section 18), if the amount in words and figures differ, the amount in words is treated as payable. Getting words right matters more than figures.
Always end with "Only" after the last word — this prevents someone from adding more amount after your writing. Example: "Rupees Twenty Five Thousand Only", not just "Rupees Twenty Five Thousand".
For paise, the standard format is "Rupees X and Paise Y Only".