Resources / The practical side of money
Make room for
what comes next.
A little less spreadsheet. A lot more perspective. Test a plan, challenge an assumption, and find the trade-offs hiding behind the numbers.
The money lab
Less guessing. Better decisions.
Monthly money to put to work
The same cash models extra debt payments, investing, or saving—not all three at once.
Slide up to $2,000 or type an exact amount. Not an allocation plan.
01 / MAKE A PLAN
Less interest. More freedom.
Compare two payoff paths using the same monthly budget. Freed-up payments keep working until every balance is gone.Highest APR first. Prioritizes interest savings.
Extra above minimums: $350. Change it in the shared control above.
$870 / month, including minimums
View sampled chart data
| Months from now | Avalanche | Snowball |
|---|---|---|
| 0 mo | $20,700 | $20,700 |
| 3 mo | $18,757 | $18,761 |
| 6 mo | $16,724 | $16,744 |
| 9 mo | $14,595 | $14,632 |
| 12 mo | $12,365 | $12,420 |
| 15 mo | $10,029 | $10,101 |
| 18 mo | $7,586 | $7,669 |
| 21 mo | $5,086 | $5,170 |
| 24 mo | $2,545 | $2,630 |
| 27 mo | $0 | $49 |
This path costs $87 less in interest than snowball.
Your payoff milestones
Behind the numbers Assumptions & limitations
APR ÷ 12 applied to each opening monthly balance, with interest rounded to cents. Minimums are paid first; the remaining fixed budget goes to the highest APR or smallest remaining balance. Paid-off minimums roll forward. The final payment is capped at what you owe.
No new purchases, changing rates, fees, daily accrual, promotional periods, or lender-specific minimum formulas. Enter each required minimum yourself; this model keeps it fixed. If no active balance declines, or payoff exceeds 100 years, no successful payoff is reported. CFPB debt resources ↗
02 / GIVE TIME A JOB
Your most underrated asset: early.
Explore compounding, the cost of waiting, and the difference between future dollars and actual purchasing power.USD · adjustable assumption
yr · adjustable assumption
Hypothetical annual effective return, not a forecast.
yr · adjustable assumption
Percent · adjustable assumption
Fine-tune fees & purchasing power
Percent · adjustable assumption
Percent · adjustable assumption
Starting contribution: $350 / month from the shared control.
At year 30 · hypothetical, not guaranteed
View sampled chart data
| Years from now | Start now | Wait 5 years |
|---|---|---|
| 0 yr | $5,000 | $5,000 |
| 3 yr | $19,977 | $5,000 |
| 6 yr | $38,215 | $9,668 |
| 9 yr | $60,423 | $25,662 |
| 12 yr | $87,466 | $45,137 |
| 15 yr | $120,396 | $68,852 |
| 18 yr | $160,496 | $97,730 |
| 21 yr | $209,326 | $132,895 |
| 24 yr | $268,786 | $175,716 |
| 27 yr | $341,191 | $227,859 |
| 30 yr | $429,359 | $291,355 |
Waiting 5 years changes the endpoint by $138,005 in future dollars. This includes missed deposits, not just missed growth.
Alternative constant-return examples, not a probability range. Future dollars, same fees and deposits.
Behind the numbers Assumptions & limitations
Monthly growth factor = [(1 + annual return) × (1 − annual fee)]^(1/12). Fees are modeled as a proportional annual asset haircut. Contributions arrive at your selected timing and increase once each year. Inflation divides each balance by (1 + inflation)^years.
The delayed scenario holds the initial amount as non-interest-bearing cash, then begins investing and contributing after the delay. Missed deposits are not made up; raises follow the original calendar. Taxes, employer matches, account limits and volatile returns are excluded. A steady return cannot capture sequence risk. All presets are illustrative. Investor.gov compounding ↗
03 / PROTECT THE PLAN
Cash is a cushion, not a finish line.
Size a reserve around your actual life, then see how saving and an assumed cash yield affect the runway.Housing, food, utilities, insurance and debt minimums.
USD · adjustable assumption
mo · adjustable assumption
A deductible, car repair, or other expense above the runway.
Percent · adjustable assumption
Percent · adjustable assumption
APY is a hypothetical input, not a current bank offer. Shared monthly cash funds your savings deposits.
6 months of essentials + $1,500 shock buffer
27% funded · $16,500 to close the gap
View sampled chart data
| Months from now | Cash savings | Reserve target |
|---|---|---|
| 0 mo | $6,000 | $22,500 |
| 6 mo | $8,204 | $22,500 |
| 12 mo | $10,441 | $22,500 |
| 18 mo | $12,711 | $22,500 |
| 24 mo | $15,016 | $22,500 |
| 30 mo | $17,356 | $22,500 |
| 36 mo | $19,731 | $22,500 |
| 42 mo | $22,142 | $22,500 |
| 48 mo | $24,589 | $22,500 |
| 54 mo | $27,073 | $22,500 |
| 60 mo | $29,595 | $22,500 |
Estimated first-year interest on today's savings alone: $182 after the tax haircut (3.04% effective APY).
Behind the numbers Assumptions & limitations
Target = monthly essentials × selected months + a one-time shock. Contributions arrive at month end. Monthly growth uses (1 + APY × [1 − tax haircut])^(1/12) − 1. The haircut is a simplified estimated reduction in interest yield, not a calculation of federal or state tax owed.
Expenses, APY and deposits stay constant; no withdrawals, inflation or account fees are included. Interest on current savings excludes future deposits. Time to target is capped at 100 years; the chart shows five years. Cash held in investments may not be immediately accessible or principal-protected. Choose the reserve horizon for your own situation. CFPB emergency savings guide ↗
04 / PRICE YOUR TIME
Revenue is not your take-home.
Account for admin hours, operating costs, and a tax reserve before giving a side hustle your evenings.hr · adjustable assumption
hr · adjustable assumption
USD · adjustable assumption
Software, supplies, insurance, subscriptions.
Percent · adjustable assumption
Percent · adjustable assumption
USD · adjustable assumption
$10,215 per year at the same pace
Follow the money / monthly
Moves positive cash into the shared monthly control and opens Start early. It does not move real money.
Behind the numbers Assumptions & limitations
Average month = 52 working weeks ÷ 12. Revenue = paid hours × hourly rate × average weeks per month. Profit subtracts fixed and variable costs; the tax reserve applies only to positive profit. Effective hourly cash includes both paid and unpaid hours.
No time off, demand fluctuations, depreciation, tax deductions, or detailed self-employment/state/federal tax rules are modeled. Startup costs are separate from recurring profit; recovery time uses after-reserve cash and rounds up to a whole month. A tax reserve is not your tax liability.
05 / EDUCATION, NOT EXECUTION
Premium is only half the story.
Move the stock price at expiration. Watch how capped upside, cash commitments and downside change the outcome.Sell a put, hold cash to buy shares at the strike if assigned.
Used for scenario examples, not option pricing.
USD · adjustable assumption
USD · adjustable assumption
qty · adjustable assumption
USD · adjustable assumption
Change the outcome, not a prediction of where the stock goes.
100 shares modeled · stock at $100.00
View sampled chart data
| Stock price at expiration | Expiration P/L |
|---|---|
| $0 | -$9,250.65 |
| $16 | -$7,650.65 |
| $32 | -$6,050.65 |
| $48 | -$4,450.65 |
| $64 | -$2,850.65 |
| $80 | -$1,250.65 |
| $95 | $249.35 |
| $108 | $249.35 |
| $124 | $249.35 |
| $140 | $249.35 |
| $156 | $249.35 |
| $160 | $249.35 |
| Move from reference | Stock price | Total P/L |
|---|---|---|
| -40% | $60.00 | -$3,250.65 |
| -15% | $85.00 | -$750.65 |
| Flat | $100.00 | $249.35 |
| +15% | $115.00 | $249.35 |
| +40% | $140.00 | $249.35 |
Behind the numbers Assumptions & limitations
Standard, unadjusted equity contracts represent 100 shares. Long call P/L = [max(stock − strike, 0) − premium] × shares − fees. Covered call P/L = [min(stock, strike) − share basis + premium] × shares − fees. Cash-secured put P/L = [premium − max(strike − stock, 0)] × shares − fees.
Expiration payoff only: no time value, Greeks, volatility, likelihood of profit, dividends, interest on collateral, taxes, spreads, stock commissions, closing or assignment fees. Share basis is not a current-market opportunity-cost calculation. Gross put collateral excludes the premium credit; covered calls require ownership of the modeled shares. American-style options may be assigned early; exact-strike assignment and after-hours price moves are uncertain. Do not interpret premium as recurring or guaranteed yield.
OIC cash-secured puts ↗ · OIC covered calls ↗ · Read the options risk disclosure ↗
The reading room
Go deeper, not down a rabbit hole.
A small, intentional library. Primary sources, useful frameworks, and fewer hot takes.
Build your foundation
Less noise. More financial footing.
Your Money, Your Goals
CFPB worksheets for cash flow, bills, debt and the everyday decisions behind a plan.
Open resource (opens in a new tab)Emergency funds, explained
Start with the why, then think through where to keep money you may need quickly.
Open resource (opens in a new tab)The Psychology of Money
Morgan Housel on behavior, patience and what enough might mean to you.
Open resource (opens in a new tab)Think like a long-term investor
Understand the engine before the ticker.
Investor.gov learning center
The SEC's investing basics, financial tools and questions to ask before investing.
Open resource (opens in a new tab)The quiet cost of fees
Look beyond the return assumption. Understand how expenses enter the picture.
Open resource (opens in a new tab)Bogleheads: getting started
A community reference for diversification, index funds and a repeatable investing process.
Open resource (opens in a new tab)Explore the mechanics
Advanced should mean understood, not exciting.
Options Industry Council
Explore strategy mechanics, payoff diagrams and what can go wrong before putting capital at risk.
Open resource (opens in a new tab)The options risk disclosure
OCC's Characteristics and Risks of Standardized Options. Read before considering a trade.
Open resource (opens in a new tab)Treasury bills, from the source
Learn auction mechanics and maturity terms. Compare access to cash, not just headline yield.
Open resource (opens in a new tab)Before you close the tab
The best plan is one
your real life can support.
A bigger number is not always a better decision. Consider your cash buffer, your time, your tolerance for loss—and who is counting on you.
Keep learning in the journal