Quiz prep
Key ideas to know
For the Build Financial Stability learning path
- A zero-based budget gives every dollar a job. Income minus everything you assign, including savings, investing, and debt payoff, equals zero; it means nothing is left unassigned, not that you spent it all.
- Plan for once-a-year bills every month. Divide a yearly bill by the months until it's due and set that aside monthly, so car registration or insurance never drains your emergency fund.
The Budget, Debt & Savings Quiz at the end of the path asks about these.
This tool is step 1 of the path: Know where your money goes.
Continue the learning pathHow the Cash Flow Tracker works
The Cash Flow Tracker builds a monthly plan from your income and expenses so you can see exactly where your money goes and how much is left over. It groups spending by category and by need, want, and savings, and it sets aside a monthly reserve for bills that only come once a year.
Who it's for
- People who earn a decent income but still feel broke at the end of the month.
- Anyone building a first budget or switching to a 50/30/20-style plan.
- Households with irregular pay, bonuses, or once-a-year bills.
Inputs and assumptions
- Income streams
- Salary, hourly, or other pay at any frequency, plus optional bonuses.
- Expenses
- Recurring bills and once-a-year costs, each with a category and a need, want, or savings tag.
- Savings
- Retirement and other savings contributions, including pre-tax deductions such as a 401(k).
- Debt payments
- Loan and card payments you make each month.
Methodology
- Every income stream and expense is converted to a monthly amount.
- Once-a-year expenses are divided by 12 and shown as an annual expense reserve.
- Monthly cash flow = monthly income − monthly expenses (including savings and debt payments).
- Savings rate = monthly Savings-category amounts ÷ monthly income (after-tax income when the tax estimate is on).
Full formulas for every tool are on our calculator methodology page.
Worked example
With $5,200 of monthly take-home income and expenses of $1,600 for housing, $250 for utilities, $600 for food, $400 for transportation, $200 for insurance, $60 for subscriptions, a $300 debt payment, and $500 of savings, your listed outflows total $3,910. Monthly cash flow is $1,290, and the savings rate the tracker shows is about 9.6% ($500 ÷ $5,200). If you add a $1,000 transfer to savings, the savings rate rises to about 28.8% and cash flow drops to $290.
Limitations
- It reflects the numbers you enter; missing expenses make cash flow look better than it is.
- Once-a-year costs are spread evenly across 12 months, which may not match when they’re due.
- It’s a planning tool, not a bank feed: it doesn’t import transactions automatically.
Frequently asked questions
Is the Cash Flow Tracker free?
Yes. It’s included with a free Net Worth Insights account.
What does the savings rate show?
The share of your monthly income that goes to items in the Savings category, such as retirement contributions and transfers to savings. With the tax estimate on, it uses after-tax income. Money left over as cash flow isn’t counted until you assign it to a Savings item.
How are weekly or quarterly amounts handled?
Every amount is converted to a monthly figure, for example weekly × 52 ÷ 12 and quarterly ÷ 3, so your whole plan lines up month to month.
Disclaimer: This tool provides estimates for general education. It isn't financial, investment, tax, or legal advice, and it can't account for everything about your situation. Consider talking with a qualified professional before making major financial decisions.