How does compound interest work?

Compound interest means you earn interest on both your initial deposit and previously earned interest. Formula: A = P × (1 + r/n)^(nt), where P is principal, r is annual rate, n is compounding frequency, and t is years.

What compounding frequency should I choose?

Monthly compounding (12/year) is most common for savings accounts. Daily compounding (365) gives slightly higher returns. More frequent compounding = higher returns, but the difference between monthly and daily is usually small.

How much will $10,000 be worth in 10 years at 5%?

At 5% annual interest with monthly compounding, $10,000 grows to approximately $16,470 in 10 years. That's $6,470 in interest earned.

Savings Calculator

Last updated: 2026-05-09

The Savings Calculator is a free financial calculator. Savings Calculator. Free online calculator with formula, examples and step-by-step guide. Plan your finances accurately and make better economic decisions.

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Common Sizes — Click to Fill

	ahorro_mensual (EUR)	Years (yr)	Annual rate % (%)
Starter	250 EUR	10 yr	7 %
Average	380 EUR	15 yr	7 %
High	500 EUR	20 yr	7 %
Premium	750 EUR	30 yr	7 %
Enterprise	1000 EUR	40 yr	7 %

Savings Goal Calculator: how much to save monthly

This calculator determines how much you need to save each month to reach a specific financial goal within a given timeframe, considering an annual rate of return.

Savings goal formula

The required monthly payment is computed as:

PMT = FV × r / ((1+r)ⁿ − 1)

Where FV is the future value (savings goal), r is the monthly rate of return and n is the total number of months. This formula assumes regular deposits at the end of each period.

Example 1: emergency fund

Problem: Save $10,000 in 2 years with 3% annual return.

Data:
- FV = 10,000; r = 0.03/12 = 0.0025; n = 24.
Monthly payment:
- PMT = 10,000 × 0.0025 / ((1.0025)²⁴ − 1) ≈ $405.34.

Answer: You need to save approximately $405.34 per month.

Example 2: car savings

Problem: Save $25,000 in 4 years with 5% annual return.

Data:
- FV = 25,000; r = 0.05/12 ≈ 0.004167; n = 48.
Monthly payment:
- PMT ≈ $471.13.

Answer: You need to save approximately $471.13 per month.

Common uses of the savings calculator

Planning savings for major purchases (car, house, travel).
Setting realistic emergency fund goals.
Computing how much to save for children's education.
Planning supplemental retirement savings.
Evaluating whether a savings goal is achievable with your budget.
Comparing different timeframes and rates of return.

Common mistakes in savings planning

Overestimating the expected rate of return.
Not considering inflation that reduces purchasing power.
Not having an emergency fund before saving for other goals.
Interrupting savings for unexpected expenses without planning.

Pro tip

Automate your savings by setting up automatic transfers on payday. "Pay yourself first" before spending on non-essentials. Even small amounts consistently grow into significant results thanks to compound interest.

What rate of return should I use?

For savings accounts, 2-4%. For index funds, 6-8% historical (not guaranteed). Be conservative in your estimates.

Should I build an emergency fund first?

Yes. Most experts recommend having 3-6 months of essential expenses before saving for other goals.

What if I cannot save that much?

Extend the timeframe or review your budget to find reducible expenses. Even starting small is better than not starting.

Where should I keep my savings?

For short-term goals, high-yield savings accounts. For long-term goals, consider diversified index funds.

Written and reviewed by the CalcToWork editorial team. Last updated: 2026-05-09.