Personal Finance Cheat Sheet

The core ideas of Personal Finance distilled into a single, scannable reference — perfect for review or quick lookup.

PiqCue — piqcue.com/personal-finance/cheatsheet

Quick Reference

Budgeting (50/30/20 Rule)

A budgeting framework that allocates 50% of after-tax income to needs (housing, groceries, utilities), 30% to wants (entertainment, dining out, hobbies), and 20% to savings and debt repayment. It provides a simple starting point for anyone who feels overwhelmed by detailed expense tracking.

Emergency Fund

A dedicated cash reserve set aside to cover unexpected expenses or income disruptions, typically held in a high-yield savings account for easy access. Financial experts generally recommend saving three to six months of essential living expenses, though those with variable income may need more.

Compound Interest

The process by which interest is earned not only on an initial principal amount but also on the accumulated interest from previous periods. Over long time horizons, compounding creates exponential growth, which is why starting to invest early is so powerful.

Debt Snowball and Debt Avalanche

Two popular strategies for paying off multiple debts. The debt snowball method focuses on paying off the smallest balance first to build psychological momentum, while the debt avalanche method targets the highest-interest-rate debt first to minimize total interest paid over time.

Index Funds

Mutual funds or exchange-traded funds (ETFs) designed to replicate the performance of a specific market index, such as the S&P 500. They offer broad diversification at very low cost, making them a cornerstone of passive investing strategies recommended by many financial experts.

Retirement Accounts (401(k) and IRA)

Tax-advantaged accounts designed to encourage long-term retirement saving. A 401(k) is an employer-sponsored plan that often includes an employer match, while an Individual Retirement Account (IRA) can be opened independently. Both come in traditional (tax-deferred) and Roth (after-tax contributions, tax-free withdrawals) varieties.

Credit Score

A three-digit number (typically 300-850 on the FICO scale) that represents your creditworthiness based on factors such as payment history, amounts owed, length of credit history, new credit inquiries, and credit mix. A higher score leads to lower interest rates on loans and better terms on financial products.

Insurance

A risk management tool in which you pay regular premiums to transfer the financial impact of large, unpredictable losses to an insurance company. Key types include health, auto, homeowners or renters, life, disability, and umbrella insurance. The goal is to protect against catastrophic financial events, not everyday expenses.

Tax Planning

The strategic arrangement of financial affairs to minimize tax liability within the bounds of the law. This includes maximizing contributions to tax-advantaged accounts, timing income and deductions, harvesting investment losses, and choosing the right filing strategies. Effective tax planning is an ongoing process, not a once-a-year activity.

Net Worth

The difference between what you own (assets) and what you owe (liabilities). It is the single most comprehensive measure of financial health and serves as a scorecard that tracks progress over time. Tracking net worth regularly helps identify whether your overall financial position is improving or declining.

Key Terms at a Glance

Annual Percentage Rate (APR):The yearly cost of borrowing money, expressed as a percentage, including interest and fees.

Asset Allocation:The strategy of distributing investments among different asset categories to balance risk and reward.

Bond:A fixed-income security representing a loan made by an investor to a borrower, typically a corporation or government, that pays periodic interest.

Budget:A plan that outlines expected income and expenses over a specific period, used to manage and control spending.

Compound Interest:Interest calculated on both the initial principal and the accumulated interest from prior periods.

Credit Score:A numerical rating (300-850 on the FICO scale) representing a borrower's creditworthiness based on credit history.

Credit Utilization:The ratio of current credit card balances to total available credit limits, expressed as a percentage.

Debt-to-Income Ratio:The percentage of gross monthly income that goes toward paying monthly debt obligations, used by lenders to assess borrowing capacity.

Diversification:Spreading investments across different asset classes, industries, and geographies to reduce overall portfolio risk.

Dollar-Cost Averaging:An investment strategy of regularly investing a fixed dollar amount regardless of market conditions.

Emergency Fund:A liquid cash reserve set aside to cover unexpected expenses or loss of income, typically 3-6 months of expenses.

Expense Ratio:The annual fee that mutual funds and ETFs charge investors, expressed as a percentage of the fund's average assets.

FICO Score:The most widely used credit scoring model, ranging from 300 to 850, developed by the Fair Isaac Corporation.

Index Fund:A type of mutual fund or ETF designed to track the performance of a specific market index.

Individual Retirement Account (IRA):A tax-advantaged account for retirement savings that individuals can open independently of an employer.

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