5.3 Building Savings

Why build savings first

Savings provide financial security and let you meet short- and long-term goals without relying on debt. An emergency fund (typically 3-6 months of living expenses) protects against job loss, medical bills, or unexpected repairs. Building savings before investing reduces the need to sell investments at a loss during emergencies.

Compound interest grows savings

Compound interest is interest earned on both the principal and previously earned interest, making savings grow faster over time. The Rule of 72 estimates how many years it takes money to double: divide 72 by the interest rate. Starting early and saving consistently — even small amounts — maximizes the power of compounding.

Choosing savings vehicles

Savings accounts offer liquidity and safety (often FDIC-insured) but lower returns. Certificates of deposit (CDs) lock money for a set term for a higher fixed rate. Money market accounts blend features of both, often requiring higher minimum balances. Matching the vehicle to your goal's time horizon balances liquidity, safety, and return.

Key terms

Emergency fund

Savings set aside (typically 3-6 months of expenses) to cover unexpected financial needs.

Compound interest

Interest calculated on both the principal and previously earned interest, accelerating growth over time.

Rule of 72

A quick estimate for doubling time: divide 72 by the annual interest rate.

Certificate of deposit (CD)

A savings vehicle that locks funds for a fixed term in exchange for a higher guaranteed interest rate.

Liquidity

How quickly and easily an asset can be converted to cash without losing value.

Try an AP-style question

How much after 2 years?

1. $1,150.00
2. $1,050.00
3. $1,102.50
4. $1,100.00