Independent · Educational · Free tools
Coink explains personal finance and small-business finance in plain language and gives you free, private, browser-based calculators to run your own numbers.
Estimate fixed-rate monthly payments, total interest, and an amortization schedule.
Estimate monthly housing costs including principal and interest plus taxes, insurance, and HOA.
Project how savings or investments could grow with contributions and compounding.
Organize income and expenses and see your monthly savings rate.
Estimate initial startup costs and required working capital for a new business.
Understand Bank of America's homebuyer grants and mortgage options, including eligibility restrictions, mortgage insurance, and costs beyond the down payment.
Check your projected 2026 federal refund or balance due, avoid common paystub mistakes, and learn how to put IRS withholding recommendations into effect.
Understand how PM MUDRA and PM SVANidhi differ, which businesses they support, and what to check before applying through a lender or official portal.
Coink is an independent educational website. It explains personal finance and small-business finance in plain language and offers free, private calculators so people can understand the numbers before making decisions.