Compounding is a table, not a slogan.

Project a starting amount plus monthly contributions and watch which year growth overtakes your deposits. Free, instant, in your browser.

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Growth vs contributions

The final balance split into what you deposited and what compounding added — the number that changes behavior.

Year-by-year view

Not just the end number: the whole curve, so year 8's boredom and year 20's payoff are both visible.

Honest assumptions

Constant-return projections labeled as such. Markets vary; the math shouldn't pretend otherwise.

Free tools

Interactive calculators — numbers first, opinions second.

Guides

The math behind patient money.

News

BlackRock Just Hit $15.3 Trillion. Where the $192 Billion in Q2 Flows Went.

Q2 2026 net inflows were broad-based: ETFs, private markets, active fixed income, systematic equity. The fee drag math that explains the ETF story, in dollars.

2026-07-18 · 4 min read
News

Inflation Falls to 3.5%: First Cool-Down in Five Months

June CPI dropped 0.4%, the biggest monthly decline since April 2020. What 3.5% instead of 4.2% inflation does to the real return on a $10,000 portfolio.

2026-07-15 · 4 min read
Retirement

Roth vs Traditional IRA in 2026: The $7,500 Question, Answered With Math

Same $7,500 limit, same investments, one difference: when you pay tax. The 30-year computed table, the 2026 IRS phase-outs, and what to do when you cannot predict your bracket.

2026-07-14 · 8 min read
News

Trump Accounts Are Live: $1,000 Seed Money Starts Compounding

Treasury contributions began July 4 with nearly 6 million sign-ups. What one untouched $1,000 becomes by age 18, at 5%, 7%, and 9%.

2026-07-11 · 4 min read
Tools

Investment Calculators Compared: Investor.gov vs NerdWallet vs Ours

Same $10,000 + $200/month scenario, three different answers. We traced every dollar of disagreement and ranked the three tools.

2026-07-08 · 6 min read
Investing

Lump Sum vs Monthly Investing: Worked Examples

Got a windfall? Two fully worked scenarios show when investing it all at once beats dollar-cost averaging - and when spreading it out wins.

2026-06-26 · 3 min read
Investing

Compound Interest: The Math That Builds Wealth

How compounding turns $10,000 into $76,000, why the Rule of 72 works, and what starting ten years earlier is actually worth - with every number shown.

2026-06-19 · 3 min read

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A worked example or calculator update that makes long-term money math concrete. Monthly, short.

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