About Vicaya

Last updated: 2026-08-18

Vicaya builds financial calculators for people who want to understand a decision before they talk to a lender, payroll provider, adviser, or tax professional. The site focuses on practical estimates: mortgage payments, paycheck withholding, debt payoff, loan repayment, investment growth, and retirement planning.

What makes the calculators different

Each calculator is designed to show the inputs, the result, and the assumptions in one place. Where a calculation produces a schedule or a real cost breakdown, the page can show charts based on that actual calculated data. Where a calculator does not have a real breakdown, Vicaya does not invent one.

Privacy by design

Calculator inputs are worked out in your browser. Vicaya does not require an account, and the numbers you type into the calculators are not sent to a Vicaya server.

Who the site is for

The typical visitor is checking one number before a conversation they cannot easily undo: what a mortgage payment would actually be, how much of an offer letter reaches a bank account, how long a card balance takes to clear, whether refinancing recovers its own costs. Vicaya is built for that moment — the point where a rough figure decides whether the conversation is worth having at all.

How a calculator gets built

Each calculator begins as a written specification covering its inputs, its formula, its rounding, and the cases it is not allowed to guess at. The calculation itself lives in a separate engine from the page that displays it, so the arithmetic can be tested without a browser. Those engines are checked against test vectors held in the repository, including regression vectors that exist specifically to catch a change in one calculator altering the result of another that shares its engine.

Pages are then checked for the things that make a tool usable rather than merely correct: labelled fields, working keyboard navigation, visible focus, headings in a sensible order, and layouts that hold up on a phone without clipping or horizontal scrolling.

Two markets, kept apart

Vicaya covers United States and India payroll and tax rules. They are deliberately separate — separate engines, separate pages, separate hubs — because take-home pay in India starts from cost to company and runs through provident fund, gratuity, professional tax, and TDS, none of which have American equivalents. Treating one as a translation of the other would produce confident, wrong numbers. Calculators that are currency-neutral, such as loan and compound interest tools, say so on the page.

What Vicaya deliberately does not do

The site does not recommend products, rank lenders, generate leads, or tell anyone what to do with their money. It does not ask for an account, an email address, or any identifying detail, and it does not invent a chart for a result that has no real component parts behind it. Where a figure cannot be confirmed against a primary source, the page says so rather than filling the gap with an assumption.

Corrections

Rules change, and a calculator that was right last year can quietly stop being right. Where a rule has been confirmed against an official source, the page names that source; where it has not, the result is labelled accordingly rather than presented with the same confidence as the rest. Read the calculation methodology and sources and assumptions for the detail behind both.

How to use the site

Use the calculators to compare scenarios and spot the assumptions that matter most. Then verify important decisions with the institution or professional responsible for your real situation.

Start with the calculator directory, the paycheck tools hub, the India salary and tax hub, the UK salary and tax hub, or the mortgage calculator.