{"id":2356,"date":"2026-10-13T21:11:47","date_gmt":"2026-10-13T15:41:47","guid":{"rendered":"https:\/\/www.tiwaripedia.com\/index.php\/2026\/10\/13\/power-of-compounding-explained\/"},"modified":"2026-10-13T21:18:18","modified_gmt":"2026-10-13T15:48:18","slug":"power-of-compounding-explained","status":"publish","type":"post","link":"https:\/\/www.tiwaripedia.com\/index.php\/2026\/10\/13\/power-of-compounding-explained\/","title":{"rendered":"The Power of Compounding Explained: Formula, Rule of 72 and Real Examples"},"content":{"rendered":"

Last updated: October 2026 \u00b7 3 min read<\/em><\/p>\n

Albert Einstein is often (probably wrongly) quoted as calling compound interest the eighth wonder of the world. Whoever said it, the idea is powerful: your money earns returns, and those returns earn returns too<\/b>.<\/p>\n

\"Infographic:
The Power of Compounding Explained: Formula, Rule of 72 and Real Examples \u2013 infographic by Tiwaripedia<\/figcaption><\/figure>\n

Simple vs compound interest<\/h2>\n
Year<\/th>Simple interest on \u20b91 lakh at 10%<\/th>Compound interest on \u20b91 lakh at 10%<\/th><\/tr><\/thead>
1<\/td>\u20b91,10,000<\/td>\u20b91,10,000<\/td><\/tr>
5<\/td>\u20b91,50,000<\/td>\u20b91,61,051<\/td><\/tr>
10<\/td>\u20b92,00,000<\/td>\u20b92,59,374<\/td><\/tr>
20<\/td>\u20b93,00,000<\/td>\u20b96,72,750<\/td><\/tr>
30<\/td>\u20b94,00,000<\/td>\u20b917,44,940<\/td><\/tr><\/tbody><\/table><\/figure>\n

The formula<\/h2>\nA = P \u00d7 (1 + r\/n)n\u00d7t<\/sup><\/b>, where P is the principal, r the annual rate, n the number of compounding periods per year and t the number of years. For yearly compounding, A = P \u00d7 (1 + r)t<\/sup>.\n

The Rule of 72<\/h2>\n

Divide 72 by the annual return to estimate how many years it takes money to double. At 8%, money doubles in about 9 years; at 12%, about 6 years; at 6%, about 12 years.<\/p>\n

Why starting early matters<\/h2>\n

Asha<\/b> invests \u20b95,000 a month from age 25 to 35 (10 years) and then stops. Rohan<\/b> invests \u20b95,000 a month from 35 to 60 (25 years). At an assumed 10% annual return, Asha’s money keeps compounding and at 60 is larger than Rohan’s (roughly \u20b91.1 crore vs \u20b967 lakh), despite investing less than half as much. Time in the market is the biggest lever.<\/p>\n

Compounding can work against you<\/h2>\n

Credit card debt at 36-42% a year compounds fast. A \u20b950,000 unpaid balance can roughly double in about two years if only minimum payments are made. Pay high-interest debt first.<\/p>\n

How to use compounding<\/h2>\n