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Savings Calculator

Calculate savings growth with compound interest, periodic contributions, annual increases, and tax impact. See accumulation schedule and growth chart.

$
%
$
increase %/yr
$
increase %/yr
years
%
End Balance after 12 Years
$81,888.15
End Balance$81,888.15
Initial Deposit$10,000.00
Total Contributions$48,283.52
Total Interest Earned$23,604.63
Initial Deposit (12%)
Contributions (59%)
Interest (29%)
Years
12
Compound
Monthly
Avg Annual Return
3.37%

Growth Over Time

Year 1 Year 12
Initial Deposit
Contributions
Interest

How Savings Grow

Your savings grow through three mechanisms: your initial deposit, ongoing contributions, and compound interest. Over long time horizons, compound interest becomes the dominant factor — earning interest on previously earned interest creates exponential growth.

The Power of Compounding

A $10,000 deposit at 5% interest grows to $16,289 in 10 years with no additional contributions. But add $300/month and it becomes $62,893. The combination of regular contributions and compound interest is the foundation of wealth building.

Compound Frequency Comparison

FrequencyPeriods/Year$10,000 at 5% (10 yrs)
Annually1$16,288.95
Semi-Annually2$16,386.16
Quarterly4$16,436.19
Monthly12$16,470.09
Daily365$16,486.65

Savings Strategies

  • Pay yourself first: Set up automatic transfers on payday before you can spend it
  • Increase annually: Boost contributions by 2-3% each year to keep pace with income growth
  • Use tax-advantaged accounts: IRAs and 401(k)s let interest compound without annual tax drag
  • Emergency fund first: Build 3-6 months of expenses in a high-yield savings account before investing
  • Compare APYs: High-yield savings accounts often pay 10-20x more than traditional bank accounts

Savings Account Types

Account TypeTypical APYAccessBest For
Traditional Savings0.01-0.5%AnytimeBasic savings at your bank
High-Yield Savings4-5%AnytimeEmergency fund, short-term goals
Money Market3-5%Limited checksHigher balances, some check access
CD (Certificate)4-5.5%Fixed termKnown time horizon, rate lock

Tax Impact on Savings

Interest earned in a regular savings account is taxed as ordinary income. At a 22% tax rate, a 5% APY effectively becomes 3.9% after tax. This "tax drag" compounds over time, making tax-advantaged accounts significantly more powerful for long-term savings.

Rule of 72

A quick way to estimate how long it takes to double your money: divide 72 by the interest rate. At 4% interest, your money doubles in roughly 18 years. At 6%, it doubles in about 12 years.

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Frequently Asked Questions

How does compound interest work?

Compound interest earns interest on your principal AND on previously earned interest. The more frequently interest compounds (daily vs annually), the faster your savings grow. This "interest on interest" effect accelerates over time.

What compound frequency should I use?

Most savings accounts compound daily or monthly. CDs typically compound daily or monthly. Use the frequency that matches your account. Daily compounding earns slightly more than monthly, but the difference is small at typical savings rates.

How does the contribution increase work?

The annual increase percentage raises your contribution each year. For example, a $3,600 annual contribution with a 2% increase becomes $3,672 in year 2, $3,745 in year 3, and so on. This helps model salary increases or growing savings habits.

What is the tax rate for?

Interest earned in taxable accounts (non-retirement) is taxed as ordinary income. Enter your marginal tax rate to see the after-tax growth. For tax-advantaged accounts like IRAs or 401(k)s, leave the tax rate at 0%.

Annual vs monthly contributions?

You can enter both annual and monthly contributions. Annual contributions are added at the start of each year. Monthly contributions are spread across compounding periods throughout the year. Use whichever matches how you actually save.

How accurate is this calculator?

This calculator provides estimates based on a constant interest rate. Real savings account rates fluctuate. The results are most useful for comparing scenarios and understanding how compounding, contributions, and time affect your savings.