Sinking Fund Calculator — Multi-Goal Savings Planner
Free sinking fund calculator. Manage multiple savings goals simultaneously, track progress with visual bars, calculate monthly allocations, and plan your sinking fund schedule.
Savings Calculator — Goal Planner & Growth Projector
Free savings calculator. Plan your savings goal, calculate monthly deposits needed, project interest growth with compound interest, and compare HYSA vs investment returns.
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HYSA: 4-5%, Stocks: 7-10%
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Time to Goal⧉
26 months
2.2 years
Total Deposits⧉
$20,800.00
Total money you put in
Interest Earned⧉
$1,312.00
At 4.5% monthly compounding
Goal⧉
$25,000.00
12% complete ($3,000.00 saved)
Starting Balance⧉
$3,000.00
12% of goal already saved
Timeline⧉
2.2 years
26 monthly deposits
Progress to Goal
12%
Savings Growth Projection
| Month | Balance | Deposits | Interest |
|---|---|---|---|
| 1 | $3,811.00 | $800.00 | $11.00 |
| 2 | $4,626.00 | $1,600.00 | $26.00 |
| 3 | $5,443.00 | $2,400.00 | $43.00 |
| 4 | $6,263.00 | $3,200.00 | $63.00 |
| 5 | $7,087.00 | $4,000.00 | $87.00 |
| 6 | $7,913.00 | $4,800.00 | $113.00 |
| 12 | $12,938.00 | $9,600.00 | $338.00 |
| 18 | $18,077.00 | $14,400.00 | $677.00 |
| 24 | $23,333.00 | $19,200.00 | $1,133.00 |
| 26 | $25,000.00 | $20,800.00 | $1,312.00 |
Interest Rate Comparison
| Rate | Months | Years | Interest Earned |
|---|---|---|---|
| 2% | 27 | 2.3 | $613.00 |
| 3% | 27 | 2.3 | $926.00 |
| 4% | 27 | 2.3 | $1,245.00 |
| 4.5% | 26 | 2.2 | $1,312.00 |
| 5% | 26 | 2.2 | $1,463.00 |
| 6% | 26 | 2.2 | $1,769.00 |
| 7% | 26 | 2.2 | $2,080.00 |
Monthly Deposit Comparison
| Deposit | Months | Years |
|---|---|---|
| $200.00 | 89 | 7.4 |
| $400.00 | 49 | 4.1 |
| $600.00 | 34 | 2.8 |
| $800.00 | 26 | 2.2 |
| $1,000.00 | 21 | 1.8 |
| $1,500.00 | 15 | 1.3 |
| $2,000.00 | 11 | 0.9 |
Planning notes, formulas, and examples
About the Savings Calculator — Goal Planner & Growth Projector
The Savings Calculator helps you plan any financial goal by answering two key questions: "How long will it take to save this amount?" and "How much do I need to save each month to reach my goal?" Whether you are building an emergency fund, saving for a down payment, or planning a dream vacation, this calculator projects your savings growth with compound interest and shows exactly what it takes to get there.
Compound interest is the engine of savings growth. Even a modest 4.5% annual rate in a high-yield savings account (HYSA) adds meaningful interest over time — and investing at 7-10% in index funds dramatically accelerates your timeline. This calculator shows both scenarios, letting you compare the power of safe savings vs market investment. The interest rate and monthly deposit comparison tables help you find the optimal strategy for your specific goal and timeline.
Enter your savings goal, current balance, monthly deposit, and expected interest rate. The calculator immediately shows your projected timeline, total deposits required, interest earned, and a month-by-month growth projection. Switch to "deposit mode" to fix a timeline and discover exactly how much per month you need to save. Preset buttons cover common goals — emergency fund, vacation, down payment, and more — so you can explore scenarios with one click.
When This Page Helps
Saving without a plan leads to inconsistency and frustration. This calculator transforms vague goals into specific monthly actions. By seeing exactly how many months it takes and how much interest you earn, you stay motivated and make informed decisions about where to keep your savings. The rate comparison table shows whether moving from a 1% bank account to a 4.5% HYSA is worth the effort (spoiler: it always is).
How to Use the Inputs
- Enter your total savings goal amount.
- Input your current savings (if any).
- Choose calculation mode: "How long?" (enter monthly deposit) or "How much?" (enter timeline).
- Set the annual interest rate based on your savings vehicle (HYSA: 4-5%, stocks: 7-10%).
- Choose compounding frequency (daily for HYSA, monthly for most investments).
- Review the timeline, interest earned, and growth projection table.
- Compare different interest rates and deposit amounts in the comparison tables.
Formula used
Time to Goal (months): solve for n where PV × (1 + r)^n + PMT × ((1 + r)^n − 1) / r = Goal
Required Monthly: PMT = (Goal − PV × (1 + r)^n) × r / ((1 + r)^n − 1)
where PV = current savings, r = monthly rate, n = months, PMT = monthly deposit
Monthly Rate = (1 + Annual Rate / Compounding Periods)^(Compounding Periods / 12) − 1
Total Interest = Final Balance − Starting Balance − Total DepositsExample Calculation
Result: 26 months (2.2 years) · Total deposits: $20,800 · Interest earned: $1,312
Starting with $3,000 and depositing $800/month at 4.5% compounded monthly, you reach $25,000 in 26 months. Total money deposited: $20,800 plus the $3,000 starting balance. Interest earned is about $1,312. The rate helps, but the biggest driver is still the consistency of the monthly deposit schedule.
Tips & Best Practices
- Move your emergency fund to a high-yield savings account immediately — the difference between 0.1% and 4.5% is hundreds of dollars per year.
- Set up automatic transfers on payday — you cannot spend what you do not see.
- For goals under 2 years, use a HYSA; for 5+ years, invest in low-cost index funds.
- Break large goals into monthly targets using this calculator — $60,000 feels impossible, $1,500/month feels achievable.
- Re-run this calculator whenever you get a raise — increasing deposits by even $100/month accelerates your timeline significantly.
- Keep your savings goal account separate from your checking to reduce impulsive spending.
The Psychology of Saving Successfully
The biggest barrier to saving is not math — it is psychology. Research shows three strategies that dramatically improve savings consistency: automation (auto-transfers remove willpower from the equation), visualization (seeing a progress bar fill up triggers dopamine), and specificity (saving "$800/month for a vacation" succeeds far more than "save more money"). It gives the specificity; pair it with auto-transfers and a tracking spreadsheet for the complete system.
HYSA vs Investing: Choosing the Right Vehicle
The decision between a high-yield savings account and investing depends entirely on your timeline. For 0-2 year goals, HYSA is non-negotiable: you need certainty that the money will be there. A 4.5% HYSA turns $20,000 into $21,800 in 2 years with zero risk. For 5+ year goals, investing historically delivers 3-5x more growth: that same $20,000 in an S&P 500 index fund averages $28,000+ in 5 years. The gray zone is 2-5 years — consider splitting between HYSA (the guaranteed portion) and conservative bonds/index funds (the growth portion).
Building Your Emergency Fund First
Before saving for any other goal, build a 3-6 month emergency fund. This fund prevents financial emergencies from becoming financial disasters — a job loss, medical bill, or car repair without an emergency fund means credit card debt at 20%+ interest. Start with a $1,000 starter fund, then build to 3 months of essential expenses, then 6 months. Keep it in a HYSA for both safety and growth, and never invest your emergency fund in the stock market.
Sources & Methodology
Last updated:
Methodology
This worksheet uses standard time-value-of-money formulas to solve either for time to goal or the monthly deposit needed to reach the goal. It compounds the current balance at the entered rate and compounding frequency, adds the recurring deposit schedule, and reports total deposits, interest earned, and the first month in which the projected balance reaches the goal.
The output is a planning estimate, not a promise that a bank, savings account, or investment will actually deliver the entered rate over the whole period. The calculator assumes a constant rate and contribution schedule and does not automatically adjust for taxes, fees, or inflation unless the user changes the inputs to reflect them.
Sources
- What is compound interest? (Consumer Financial Protection Bureau) — CFPB explainer covering compound-interest mechanics and APY concepts used by the worksheet.
- Compound Interest Calculator (Investor.gov / U.S. Securities and Exchange Commission) — Official SEC investor-education calculator for compound-growth and recurring-savings planning.
- Saving and managing your money (Federal Deposit Insurance Corporation) — Savings-account and deposit-planning context for short- and medium-term goals.
Frequently Asked Questions
A HYSA is a savings account that offers significantly higher interest than traditional bank savings accounts — typically 4-5% APY versus 0.01-0.5%. They are offered by online banks with lower overhead, are FDIC insured up to $250,000, and provide the same liquidity as regular savings accounts. Every emergency fund and short-term savings goal should be in a HYSA.
At minimum, build a 3-6 month emergency fund covering essential expenses. Beyond that, goals vary: 10-20% down payment for a home, $10,000-30,000 for a new car, and ongoing retirement savings of 15-20% of income. The exact amount depends on your goals, income stability, and risk tolerance.
For goals within 1-3 years: save in a HYSA (4-5%, no risk). For 3-5 year goals: consider a mix of HYSA and conservative investments. For 5+ year goals: invest in diversified index funds (historically 7-10% annual returns). Never invest money you need within 2 years — market downturns could force you to sell at a loss.
Compound interest earns interest on your interest. With $10,000 at 5%, you earn $500 in year one. In year two, you earn 5% on $10,500 = $525. This snowball effect accelerates over time — Einstein reportedly called it the most powerful force in the universe. Daily compounding earns slightly more than monthly, which earns more than annual.
Automate your savings with an auto-transfer on payday to a separate HYSA. Use the "pay yourself first" approach: savings come out before discretionary spending. Set specific goals with deadlines (use this calculator!) rather than vague intentions. Having a clear target and timeline makes consistent saving dramatically easier.
Use separate savings accounts or "buckets" for each goal (many online banks offer sub-accounts). Calculate the monthly deposit needed for each goal and set up individual auto-transfers. Check out our Sinking Fund Calculator for managing multiple savings goals simultaneously.
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