Average Daily Balance Calculator
Simulate your credit card statement and see exactly how purchases, payments, and timing change your finance charge.
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Configure Your Billing Cycle
Set your APR, cycle length, and statement starting balance. Then add purchases and payments to mirror your real-world card activity.
Transactions This Cycle
Add purchases, payments, or merchandise returns. The calculator adjusts your balance on each day of the cycle.
| Day | Type | Amount | Description | |
|---|---|---|---|---|
$ | ||||
$ | ||||
$ |
Daily Periodic Rate
0.052%
APR ÷ 365. Each day's balance accrues interest at this rate.
Average Daily Balance
$1,106.67
Mean balance across 30 days, after purchases and payments.
Finance Charge
$17.27
Interest owed at statement close based on the selected method.
Projected Statement Balance
$977.27
Starting balance + purchases − payments + finance charge.
Track how every purchase or payment shifted your balance and interest for each day.
| Day | Transactions | End-of-day balance | Interest |
|---|---|---|---|
| 1 | No activity | $1,000.00 | $0.52 |
| 2 | No activity | $1,000.00 | $0.52 |
| 3 |
| $1,120.00 | $0.58 |
| 4 | No activity | $1,120.00 | $0.58 |
| 5 | No activity | $1,120.00 | $0.58 |
| 6 | No activity | $1,120.00 | $0.58 |
| 7 | No activity | $1,120.00 | $0.58 |
| 8 | No activity | $1,120.00 | $0.58 |
| 9 | No activity | $1,120.00 | $0.58 |
| 10 |
| $1,360.00 | $0.71 |
| 11 | No activity | $1,360.00 | $0.71 |
| 12 | No activity | $1,360.00 | $0.71 |
| 13 | No activity | $1,360.00 | $0.71 |
| 14 | No activity | $1,360.00 | $0.71 |
| 15 | No activity | $1,360.00 | $0.71 |
| 16 | No activity | $1,360.00 | $0.71 |
| 17 | No activity | $1,360.00 | $0.71 |
| 18 |
| $960.00 | $0.50 |
| 19 | No activity | $960.00 | $0.50 |
| 20 | No activity | $960.00 | $0.50 |
| 21 | No activity | $960.00 | $0.50 |
| 22 | No activity | $960.00 | $0.50 |
| 23 | No activity | $960.00 | $0.50 |
| 24 | No activity | $960.00 | $0.50 |
| 25 | No activity | $960.00 | $0.50 |
| 26 | No activity | $960.00 | $0.50 |
| 27 | No activity | $960.00 | $0.50 |
| 28 | No activity | $960.00 | $0.50 |
| 29 | No activity | $960.00 | $0.50 |
| 30 | No activity | $960.00 | $0.50 |
Cycle Summary
- Total purchases
- $360.00
- Total payments & credits
- -$400.00
- Net activity
- -$40.00
- Interest method
- Average Daily Balance
- Grace period assumption
- Not in effect
Insights
- Every $100 paid earlier in the cycle reduces interest by about $1.56.
- Switching from ADB to the previous balance method would add $1.66 in interest this cycle.
- Paying the full balance by the due date next cycle will reactivate the grace period and prevent purchases from accruing interest.
Key Financial Terms
Understand the essential concepts behind this calculator
Frequently Asked Questions
Common questions about the Average Daily Balance Calculator
🎓 Student Loan Data Sources
• Undergraduate Direct Loans: 6.53%
• Graduate Direct Unsubsidized: 8.08%
• Direct PLUS Loans: 9.08%
→ Source: Federal Student Aid - Interest Rates
• SAVE Plan: 5% of discretionary income (undergraduate), 10% (graduate), 0% below 225% FPL
• PAYE Plan: 10% of discretionary income, capped at 10-year standard
• IBR Plan: 10-15% of discretionary income based on loan date
• ICR Plan: Lesser of 20% discretionary income or fixed 12-year payment
→ Source: Federal Student Aid - Income-Driven Repayment Plans
• Requires 120 qualifying monthly payments (10 years)
• Must work full-time for qualifying employer (government/non-profit)
• Remaining balance forgiven tax-free after 120 payments
→ Source: Federal Student Aid - PSLF Program
• Bachelor's degree borrowers: $28,950 average debt
• Total outstanding student loan debt (U.S.): $1.75 trillion
• Average monthly payment: $200-$299 for most borrowers
→ Source: Education Data Initiative - Student Loan Debt Statistics
• Private refinancing rates: 4.5% - 9.5% (varies by credit, term)
• Note: Refinancing federal loans means losing federal protections (IDR, PSLF, forbearance)
→ Source: CFPB - Student Loan Refinancing
Important: Student loan rules change frequently. Always verify current program requirements at StudentAid.gov before making decisions.
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⚠️ Important Disclaimer
This Average Daily Balance Calculator provides estimates for educational and informational purposes only. Actual results may vary significantly based on individual circumstances, market conditions, regulatory changes, and other factors beyond the scope of this calculator.
The calculations and projections provided are based on assumptions and historical data that may not reflect future performance.Past performance does not guarantee future results.
This tool is not financial advice, tax advice, legal advice, or investment advice. For personalized guidance tailored to your specific situation, please consult with qualified professionals including:
- Certified Financial Planner (CFP)
- Certified Public Accountant (CPA) for tax matters
- Licensed attorney for legal matters
- Registered Investment Advisor (RIA) for investment decisions
Data Accuracy: All data sources, statistics, and rates were verified as accurate as of October 2025. Tax rates, market conditions, and other financial data change over time. Always verify current rates and consult official sources.
No Warranties: While we strive for accuracy, we make no warranties or guarantees regarding the accuracy, completeness, or reliability of any information provided. Use this tool at your own risk.