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Formula Library

Google Sheets Formulas for Personal Finance

Ready-to-use formulas for budgeting, tracking expenses, calculating loan payments, and projecting savings growth. Copy, paste, and customize.

All Formulas

50/30/20 Budget Allocation

beginner

Calculate how much to allocate to needs, wants, and savings based on the popular 50/30/20 budgeting rule.

=income * 0.50 (needs), =income * 0.30 (wants), =income * 0.20 (savings) Budgeting

Amortization Schedule

advanced

Build a complete loan payment schedule showing principal, interest, and remaining balance for each payment.

=PMT(rate/12, periods, -principal) Debt & Loans

Annual to Hourly Salary Converter

beginner

Convert between annual salary, monthly, weekly, and hourly pay rates using simple Google Sheets formulas and examples.

=annual_salary / 2080 Income

Array Formulas

advanced

Perform calculations across entire ranges at once, enabling powerful automated financial analysis in Google Sheets.

=ARRAYFORMULA(formula_applied_to_range) Utilities

Barista FIRE Income Needed

intermediate

Calculate how much part-time income covers the gap between portfolio withdrawals and living expenses.

=annual_expenses - (portfolio * withdrawal_rate) FIRE

Budget Variance

beginner

Calculate the difference between planned budget and actual spending to see if you're over or under budget.

=planned_amount - actual_amount Budgeting

CAGR (Compound Annual Growth Rate)

intermediate

Measure the smoothed annual return of an investment, portfolio, or asset over any time period using Google Sheets formulas.

=(ending_value/beginning_value)^(1/years)-1 Investment

Car Affordability Calculator

beginner

Calculate how much car you can afford based on income using the 10-15% rule in Google Sheets with step-by-step examples.

=monthly_income * 0.10 Affordability

Coast FIRE Calculator

intermediate

Calculate when you can stop actively saving for retirement and let compound growth do the rest in Google Sheets.

=retirement_target / (1 + return_rate)^years_until_retirement Savings & Interest

Coast FIRE Target Amount

intermediate

Calculate the lump sum needed today so compound growth alone covers your retirement target using Google Sheets formulas.

=retirement_target / (1 + return_rate)^years_to_retirement FIRE

College Savings Calculator (529 Plan)

intermediate

Calculate how much to save monthly for college education using a 529 plan with Google Sheets formulas and examples.

=PMT(return_rate/12, years*12, 0, -future_college_cost) Education

Compound Interest (FV)

beginner

Calculate how much your savings will grow over time with compound interest using the FV function in Google Sheets.

=FV(rate/12, periods, -monthly_contribution, -initial_deposit) Savings & Interest

Compound Monthly Savings Growth

intermediate

Project how regular monthly contributions grow over time using the FV function with compound interest.

=FV(annual_rate/12, months, -monthly_contribution, -starting_balance) Savings & Interest

Conditional Formatting Formulas

beginner

Google Sheets formulas to use with conditional formatting for visual alerts and highlights in your budget spreadsheet.

=A2>B2 (to highlight when actual exceeds budget) Utilities

Credit Card Minimum Payment

beginner

Calculate how credit card minimum payments are determined and see why paying only the minimum costs so much over time.

=MAX(balance * 0.01 + monthly_interest, 25) Debt & Loans

Credit Utilization Rate

beginner

Calculate how much of your available credit you are using - a key factor in credit scoring - with Google Sheets formulas.

=total_balances / total_credit_limits Debt & Loans

Data Validation Dropdown

beginner

Create dropdown menus for consistent category selection in budget tracking and expense logging with Google Sheets.

Data > Data validation > Dropdown Utilities

Days Until Date

beginner

Calculate the number of days remaining until a target date for financial deadlines, goals, and payment due dates.

=target_date - TODAY() Utilities

Debt Avalanche Priority Order

intermediate

Use SORT to rank your debts by interest rate from highest to lowest - the mathematically optimal payoff order.

=SORT(debt_range, rate_column, FALSE) Debt & Loans

Debt Payoff Date

beginner

Calculate the exact date when a debt will be fully paid off based on your current payment schedule in Google Sheets.

=EDATE(TODAY(), NPER(rate/12, -payment, balance)) Debt & Loans

Debt Payoff Timeline

intermediate

Calculate how many months it will take to pay off a debt with fixed monthly payments using a simple spreadsheet formula.

=NPER(rate/12, -payment, balance) Debt & Loans

Debt-to-Income Ratio

beginner

Calculate your debt-to-income ratio in Google Sheets - a key metric lenders use and an important financial health indicator.

=total_monthly_debt / gross_monthly_income Debt & Loans

Discretionary Spending Available

beginner

Calculate how much is left for flexible spending after covering fixed costs and savings targets in your budget spreadsheet.

=income - fixed_expenses - savings_target Budgeting

Dividend Yield

beginner

Calculate the annual percentage return from dividends relative to stock price with a simple Google Sheets formula.

=annual_dividend / current_price Investment

Dollar Cost Averaging

beginner

Calculate your average cost per share when investing a fixed amount regularly using a Google Sheets spreadsheet formula.

=total_invested / total_shares Investment

Effective Tax Rate

beginner

Calculate the actual percentage of income that goes to taxes - often much lower than your marginal bracket.

=total_tax_paid / total_gross_income Income

Emergency Fund Target

beginner

Calculate your ideal emergency fund size based on monthly expenses and risk factors using a Google Sheets formula.

=monthly_expenses * months_coverage Savings & Interest

Expense-to-Income Ratio

beginner

Calculate what percentage of your income goes to expenses - a quick way to see where your money is going.

=total_expenses / total_income Budgeting

Extra Payment Impact

intermediate

Calculate how much time and interest you can save by making extra payments on your debt with spreadsheet formulas.

=NPER(rate/12, -(payment + extra), balance) - NPER(rate/12, -payment, balance) Debt & Loans

FIRE Number Calculator

beginner

Calculate your Financial Independence Retire Early target based on annual expenses using a simple spreadsheet formula.

=annual_expenses * 25 FIRE

How Much Do I Need to Retire

beginner

Calculate your retirement savings target based on expected annual expenses and the 25x rule in Google Sheets.

=annual_expenses * 25 Savings & Interest

Inflation-Adjusted Value

intermediate

Calculate the real purchasing power of future money by accounting for inflation using simple Google Sheets formulas.

=future_value / (1 + inflation_rate)^years Savings & Interest

Interest Saved by Extra Payment

intermediate

Calculate exactly how much interest you save by adding extra to your monthly debt payment using Google Sheets formulas.

=(payment * NPER(rate/12, -payment, balance) - balance) - ((payment+extra) * NPER(rate/12, -(payment+extra), balance) - balance) Debt & Loans

Internal Rate of Return (IRR)

advanced

Calculate the annualized return rate of an investment with multiple cash flows over time using Google Sheets IRR function.

=IRR(cash_flows) Investment

Lean FIRE vs Fat FIRE Target

intermediate

Calculate and compare minimal versus comfortable financial independence numbers side by side in a Google Sheets formula.

=annual_expenses / withdrawal_rate FIRE

Monthly Average Spending

beginner

Calculate your average spending per category over multiple months to spot trends and set realistic budgets.

=AVERAGEIF(category_range, "Category", amount_range) Budgeting

Monthly Loan Payment (PMT)

beginner

Calculate the monthly payment required to pay off a loan with a fixed interest rate over a set number of periods.

=PMT(rate/12, periods, -principal) Debt & Loans

Mortgage Affordability Calculator

beginner

Calculate how much house you can afford based on income, debts, and the 28/36 rule using Google Sheets formulas.

=monthly_income * 0.28 Affordability

Net Present Value (NPV)

advanced

Calculate the current dollar value of future cash flows, discounted at your required rate of return.

=NPV(discount_rate, cash_flows) + initial_investment Investment

Net Worth Growth Rate

beginner

Calculate how fast your net worth is growing year-over-year to track financial progress in a Google Sheets spreadsheet.

=(current_net_worth - previous_net_worth) / previous_net_worth Investment

Overtime Pay Calculator

beginner

Calculate overtime earnings with the standard 1.5x rate, splitting regular and overtime hours in a Google Sheets formula.

=IF(hours>40, 40*rate + (hours-40)*rate*1.5, hours*rate) Income

Percentage of Budget Used

beginner

Calculate what percentage of your budget you have spent in each category to track progress throughout the month.

=spent/budget Budgeting

Portfolio Allocation Percentage

beginner

Calculate what percentage of your total portfolio each investment represents using a simple Google Sheets formula.

=investment_value / total_portfolio_value * 100 Investment

QUERY for Financial Data

advanced

Use SQL-like queries to filter, sort, aggregate, and analyze transaction data without complex formulas.

=QUERY(data, "SELECT columns WHERE conditions") Utilities

Real Return (Inflation-Adjusted)

intermediate

Calculate investment returns adjusted for inflation to see actual purchasing power growth with Google Sheets formulas.

=(1 + nominal_return) / (1 + inflation_rate) - 1 Investment

Rent vs Buy Calculator

intermediate

Compare the true cost of renting versus buying a home over time with practical spreadsheet formulas and examples.

=buy_costs - rent_costs Affordability

Required Monthly Savings

beginner

Calculate how much you need to save each month to reach a financial goal by a target date using Google Sheets formulas.

=PMT(rate/12, months, -current_savings, goal) Savings & Interest

Return on Investment (ROI)

beginner

Calculate the percentage return on an investment relative to its cost using a simple Google Sheets formula and examples.

=(current_value - initial_investment) / initial_investment * 100 Investment

Rolling Average Spending

intermediate

Calculate a 3-month or 6-month rolling average for each budget category to smooth out irregular expenses.

=AVERAGE(OFFSET(current_cell, -months+1, 0, months, 1)) Budgeting

Rule of 72

beginner

Quickly estimate how long it takes for an investment to double at a given interest rate using this simple formula.

=72/annual_rate Savings & Interest

Running Balance

beginner

Track your account balance after each transaction with a cumulative running total formula for Google Sheets.

=starting_balance + SUM($C$2:C2) Budgeting

Safe Withdrawal Amount

beginner

Calculate how much you can withdraw from a portfolio each year and each month using the 4% rule in Google Sheets.

=portfolio_value * 0.04 FIRE

Safe Withdrawal Rate (4% Rule)

beginner

Calculate how much you can withdraw annually from your retirement portfolio without running out of money.

=portfolio_value * 0.04 Savings & Interest

Savings Goal Timeline

intermediate

Calculate how many months it will take to reach a savings goal with regular contributions using Google Sheets formulas.

=NPER(rate/12, -monthly_savings, current_savings, -goal_amount) Savings & Interest

Savings Rate

beginner

Calculate the percentage of income you save - the most important metric for building wealth and reaching financial independence.

=(income - expenses) / income FIRE

Sparkline Trends

intermediate

Create mini charts inside cells to visualize spending trends, account balances, and financial progress.

=SPARKLINE(data_range, {"charttype","line"}) Utilities

Sum Expenses by Category

beginner

Use SUMIF to add up all transactions that match a specific category, like Groceries or Entertainment, in Google Sheets.

=SUMIF(category_range, "Category Name", amount_range) Budgeting

SUMIFS with Multiple Criteria

intermediate

Sum values that match multiple conditions, like totaling expenses for a specific category within a date range.

=SUMIFS(sum_range, criteria_range1, criteria1, criteria_range2, criteria2) Utilities

Take-Home Pay Calculator

intermediate

Estimate your net pay after federal, state, and FICA taxes are deducted from gross income using Google Sheets formulas.

=gross_pay - federal_tax - state_tax - fica_tax - deductions Income

Total Interest Paid

beginner

Calculate the total amount of interest paid over the life of a loan using Google Sheets with practical examples.

=(PMT(rate/12, periods, -principal) * periods) - principal Debt & Loans

VLOOKUP for Category Matching

intermediate

Automatically look up and return information based on a category or transaction name using VLOOKUP in Google Sheets.

=VLOOKUP(lookup_value, table_range, column_index, FALSE) Utilities

XIRR (Irregular Cash Flows)

advanced

Calculate investment returns when cash flows occur at irregular intervals using the XIRR function in Google Sheets.

=XIRR(cash_flows, dates) Investment

Year-Over-Year Spending Change

beginner

Compare spending by category between this year and last year, with percentage change to spot trends.

=(this_year - last_year) / last_year Budgeting

Years to Financial Independence

intermediate

Calculate how many years until you reach your FIRE number based on savings rate and expected investment returns.

=NPER(return_rate, -annual_savings, -current_savings, fire_number) FIRE