Quick-reference for tax brackets, contribution limits, formulas, deadlines, and checklists. Bookmark this page. Numbers are for the 2025 tax year unless noted. The IRS updates these annually, so double-check current-year figures at irs.gov before making decisions.
Federal Income Tax Brackets (2025)
Single Filers
| Taxable Income | Tax Rate |
|---|
| $0 - $11,925 | 10% |
| $11,926 - $48,475 | 12% |
| $48,476 - $103,350 | 22% |
| $103,351 - $197,300 | 24% |
| $197,301 - $250,525 | 32% |
| $250,526 - $626,350 | 35% |
| Over $626,350 | 37% |
Married Filing Jointly
| Taxable Income | Tax Rate |
|---|
| $0 - $23,850 | 10% |
| $23,851 - $96,950 | 12% |
| $96,951 - $206,700 | 22% |
| $206,701 - $394,600 | 24% |
| $394,601 - $501,050 | 32% |
| $501,051 - $751,600 | 35% |
| Over $751,600 | 37% |
How Marginal Brackets Work
Brackets apply only to income within that range. Example for a single filer earning $80,000:
$0 - $11,925 × 10% = $1,192.50
$11,926 - $48,475 × 12% = $4,385.88
$48,476 - $80,000 × 22% = $6,935.28
----------
Total Federal Tax: $12,513.66
Effective Rate: 15.6%
Your marginal rate (22%) is not your effective rate (15.6%). Never turn down a raise because "it'll put me in a higher bracket": only the dollars above the threshold are taxed at the higher rate.
Standard Deduction (2025)
| Filing Status | Amount |
|---|
| Single | $15,000 |
| Married filing jointly | $30,000 |
| Head of household | $22,500 |
| Additional (age 65+ or blind, single) | +$2,000 |
| Additional (age 65+ or blind, married) | +$1,600 |
Capital Gains Tax Rates (2025)
| Taxable Income (Single) | Long-Term Rate |
|---|
| $0 - $48,350 | 0% |
| $48,351 - $533,400 | 15% |
| Over $533,400 | 20% |
Short-term capital gains (held less than 1 year) are taxed as ordinary income.
Retirement Account Contribution Limits (2025)
| Account | Under 50 | Age 50+ Catch-Up | Total 50+ |
|---|
| 401k / 403b / 457b | $23,500 | +$7,500 | $31,000 |
| Traditional IRA | $7,000 | +$1,000 | $8,000 |
| Roth IRA | $7,000 | +$1,000 | $8,000 |
| SIMPLE IRA | $16,500 | +$3,500 | $20,000 |
| SEP IRA | $70,000 or 25% of comp | N/A | $70,000 |
| Solo 401k (employee) | $23,500 | +$7,500 | $31,000 |
| Solo 401k (total employee + employer) | $70,000 | +$7,500 | $77,500 |
Roth IRA Income Limits (2025)
| Filing Status | Full Contribution | Phase-Out | No Contribution |
|---|
| Single | MAGI < $150,000 | $150,000 - $165,000 | > $165,000 |
| Married filing jointly | MAGI < $236,000 | $236,000 - $246,000 | > $246,000 |
Backdoor Roth: If over the income limit, contribute to a Traditional IRA (non-deductible) then convert to Roth. Legal, common, IRS-acknowledged.
Traditional IRA Deduction Phase-Outs (2025, Covered by Employer Plan)
| Filing Status | Full Deduction | Phase-Out | No Deduction |
|---|
| Single | MAGI < $79,000 | $79,000 - $89,000 | > $89,000 |
| Married filing jointly | MAGI < $126,000 | $126,000 - $146,000 | > $146,000 |
HSA Contribution Limits (2025)
| Coverage | Limit | Age 55+ Catch-Up |
|---|
| Self-only | $4,300 | +$1,000 |
| Family | $8,550 | +$1,000 |
HSA triple tax advantage: Tax-deductible contributions, tax-free growth, tax-free withdrawals for qualified medical expenses. After age 65, non-medical withdrawals taxed as income (like a Traditional IRA).
Other Contribution Limits (2025)
| Account | Limit |
|---|
| 529 plan (gift tax exclusion) | $19,000/year per beneficiary (no income limit) |
| 529 superfunding (5-year election) | $95,000 lump sum |
| FSA (healthcare) | $3,300 |
| Dependent Care FSA | $5,000 |
| I-Bond annual purchase limit | $10,000 per SSN (electronic) |
| Gift tax exclusion | $19,000 per recipient per year |
| Estate tax exemption | $13,990,000 |
Social Security (2025)
| Item | Amount |
|---|
| Full retirement age (born 1960+) | 67 |
| Early retirement (reduced benefits) | 62 |
| Delayed retirement credit (per year past FRA, up to 70) | +8% |
| Maximum benefit at FRA | ~$4,018/month |
| Maximum benefit at 70 | ~$5,108/month |
| Earnings subject to SS tax | $176,100 |
| SS tax rate (employee) | 6.2% |
| Medicare tax rate (employee) | 1.45% (+ 0.9% above $200k) |
Claiming strategy: Every year you delay past 62 increases your benefit by roughly 6-8%. If you're healthy and can afford to wait, delay to 70 for maximum lifetime benefits.
Important Financial Deadlines
Annual Deadlines
| Date | Deadline |
|---|
| January 1 | New contribution limits take effect, FSA grace period starts (if applicable) |
| January 31 | Employers issue W-2s and 1099s |
| March 15 | S-Corp and partnership tax returns due (or extension) |
| April 1 | Required Minimum Distribution (RMD) deadline for the year you turn 73 (first year only) |
| April 15 | Federal tax filing deadline, IRA/Roth IRA/HSA contribution deadline for prior year, Q1 estimated tax payment |
| June 15 | Q2 estimated tax payment |
| September 15 | Q3 estimated tax payment, extended S-Corp/partnership returns due |
| October 15 | Extended individual tax returns due |
| November 1 | ACA marketplace open enrollment begins (typically) |
| December 15 | ACA marketplace enrollment deadline for January coverage (typically) |
| December 31 | 401k/403b contribution deadline, Roth conversion deadline, tax-loss harvesting deadline, RMD deadline, charitable contribution deadline, FSA spending deadline (unless grace period) |
Quarterly Estimated Tax Payments (2025)
| Quarter | Income Period | Payment Due |
|---|
| Q1 | Jan 1 - Mar 31 | April 15 |
| Q2 | Apr 1 - May 31 | June 15 |
| Q3 | Jun 1 - Aug 31 | September 15 |
| Q4 | Sep 1 - Dec 31 | January 15 (next year) |
Who must pay: Self-employed, freelancers, and anyone who expects to owe $1,000+ in taxes beyond withholding. Penalty for underpayment if you don't pay as you go.
Compound Interest
A = P × (1 + r/n)^(n×t)
A = Final amount
P = Principal (starting amount)
r = Annual interest rate (decimal)
n = Compounding frequency per year
t = Years
Example: $10,000 at 7% for 30 years, compounded monthly
A = 10,000 × (1 + 0.07/12)^(12×30)
A = 10,000 × (1.00583)^360
A = 10,000 × 8.1165
A = $81,165
Future Value of Monthly Contributions
FV = PMT × [((1 + r/n)^(n×t) - 1) / (r/n)]
PMT = Monthly contribution
r = Annual return rate (decimal)
n = 12 (monthly)
t = Years
Example: $500/month at 7% for 30 years
FV = 500 × [((1 + 0.07/12)^(360) - 1) / (0.07/12)]
FV = 500 × [(8.1165 - 1) / 0.00583]
FV = 500 × 1,220.38
FV = $610,191
$500/month × 30 years = $180,000 contributed. Growth = $430,191. That's compound interest at work.
Rule of 72
Years to double = 72 ÷ Annual Return Rate
Examples:
7% return: 72 ÷ 7 = 10.3 years to double
10% return: 72 ÷ 10 = 7.2 years to double
3% return: 72 ÷ 3 = 24 years to double
20% debt: 72 ÷ 20 = 3.6 years to double (what credit card debt does to you)
Monthly Mortgage Payment
M = P × [r(1+r)^n] / [(1+r)^n - 1]
M = Monthly payment
P = Loan principal
r = Monthly interest rate (annual ÷ 12)
n = Total number of payments (years × 12)
Example: $300,000 loan at 6.5% for 30 years
r = 0.065/12 = 0.005417
n = 360
M = 300,000 × [0.005417(1.005417)^360] / [(1.005417)^360 - 1]
M = 300,000 × [0.005417 × 6.9913] / [6.9913 - 1]
M = 300,000 × 0.03787 / 5.9913
M = 300,000 × 0.006321
M = $1,896/month (principal + interest only, no taxes/insurance)
Debt Payoff Timeline
Months to pay off = -log(1 - (Balance × r / Payment)) / log(1 + r)
r = Monthly interest rate (APR ÷ 12)
Example: $5,000 balance, 22% APR, $200/month payment
r = 0.22/12 = 0.01833
Months = -log(1 - (5000 × 0.01833 / 200)) / log(1 + 0.01833)
Months = -log(1 - 0.4583) / log(1.01833)
Months = -log(0.5417) / 0.00817
Months = 0.2661 / 0.00817
Months = 32.6 months (~2.7 years)
Total paid: $6,520 | Interest cost: $1,520
4% Rule (Retirement Withdrawal)
Annual safe withdrawal = Portfolio × 0.04
Required portfolio = Annual expenses × 25
Example: Need $60,000/year in retirement
Required portfolio: $60,000 × 25 = $1,500,000
Based on the Trinity Study. 4% withdrawal rate historically survives 30-year retirements 95%+ of the time. Conservative alternative: 3.5%.
Key Financial Ratios
Track these numbers about yourself:
| Ratio | Formula | Healthy Target | Danger Zone |
|---|
| Savings rate | (Total savings + investments) ÷ Gross income | 20%+ | Below 10% |
| Debt-to-income (DTI) | Monthly debt payments ÷ Gross monthly income | Below 36% | Above 43% |
| Housing cost ratio | (Mortgage/rent + insurance + taxes) ÷ Gross monthly income | Below 28% | Above 36% |
| Emergency fund ratio | Liquid savings ÷ Monthly expenses | 3-6 months | Below 1 month |
| Investment expense ratio | Total investment fees ÷ Total invested | Below 0.20% | Above 1% |
| Retirement savings rate | Annual retirement contributions ÷ Gross income | 15%+ | Below 5% |
| Liquid net worth ratio | (Assets − home equity − liabilities) ÷ Annual expenses | 1x+ | Negative |
Example Ratio Check
Gross Income: $90,000/year ($7,500/month)
Take-Home: $6,200/month
Savings Rate: $1,500/month ÷ $7,500 = 20% ✓
DTI: $1,950/month ÷ $7,500 = 26% ✓
Housing Ratio: $1,800/month ÷ $7,500 = 24% ✓
Emergency Fund: $18,000 ÷ $4,500/month = 4.0 ✓
Retirement Rate: $12,000/year ÷ $90,000 = 13.3% ⚠ (target 15%)
Annual Financial Review Checklist
Do this every December or January. Block 2-3 hours.
Income and Taxes
- [ ] Review total income for the year
- [ ] Verify W-4 withholding is correct (refund too large = interest-free loan to IRS)
- [ ] Maximize 401k/IRA contributions before year-end deadline
- [ ] Harvest tax losses in taxable accounts if applicable
- [ ] Make any final charitable contributions
- [ ] Review estimated tax payments if self-employed
Budget and Spending
- [ ] Review actual spending vs. budget for the year
- [ ] Identify and cancel unused subscriptions
- [ ] Review recurring bills for rate increases
- [ ] Set budget for the new year
- [ ] Negotiate bills (insurance, phone, internet, subscriptions)
Savings and Investments
- [ ] Calculate net worth and compare to last year
- [ ] Review retirement account balances and contributions
- [ ] Check asset allocation, rebalance if off target
- [ ] Review investment fees, switch to lower-cost funds if available
- [ ] Confirm you're getting full employer 401k match
- [ ] Review savings goals progress
Insurance
- [ ] Review health insurance during open enrollment
- [ ] Review life insurance coverage (10-12x income)
- [ ] Shop auto and home/renters insurance for better rates
- [ ] Check disability insurance coverage
- [ ] Review umbrella policy if net worth > $500k
Credit and Debt
- [ ] Pull free credit report (annualcreditreport.com)
- [ ] Review credit score
- [ ] Check for errors or fraudulent accounts
- [ ] Review debt payoff progress
- [ ] Consider refinancing if rates have dropped
Estate and Legal
- [ ] Review and update beneficiaries on all accounts
- [ ] Review will, trust, power of attorney (update if life changed)
- [ ] Verify life insurance beneficiaries match your wishes
- [ ] Confirm guardian designations for minor children are current
Accounts and Access
- [ ] Update passwords on financial accounts
- [ ] Verify two-factor authentication is enabled everywhere
- [ ] Ensure spouse/partner knows where all accounts are
- [ ] Update your financial account inventory document
Glossary
| Term | Definition |
|---|
| APR | Annual Percentage Rate: the yearly cost of borrowing, including fees |
| APY | Annual Percentage Yield: the yearly return on savings, including compounding |
| Asset allocation | How investments are divided across stocks, bonds, and other categories |
| Beneficiary | Person or entity designated to receive assets from an account or policy |
| Capital gains | Profit from selling an investment; short-term (< 1 year) taxed as income, long-term taxed at lower rates |
| Compound interest | Interest earned on both principal and previously earned interest |
| CPA | Certified Public Accountant: licensed tax and accounting professional |
| CFP | Certified Financial Planner: fiduciary financial planning credential |
| DTI | Debt-to-income ratio: monthly debt payments divided by gross monthly income |
| Emergency fund | Liquid savings covering 3-6 months of expenses for unexpected costs or income loss |
| Escrow | Account held by a third party (often mortgage servicer) for property taxes and insurance |
| Fiduciary | Legally required to act in your best interest (not all advisors are fiduciaries) |
| FICO score | Credit score model ranging from 300-850 used by most lenders |
| HYSA | High-Yield Savings Account: online savings paying significantly more than traditional banks |
| Index fund | Fund that tracks a market index (S&P 500, total market) with minimal fees |
| IRA | Individual Retirement Account: tax-advantaged account for retirement savings |
| Liquidity | How quickly an asset can be converted to cash without significant loss |
| MAGI | Modified Adjusted Gross Income: used to determine eligibility for tax benefits |
| Marginal tax rate | Tax rate on the next dollar earned (your highest bracket) |
| Effective tax rate | Total tax paid divided by total income (always lower than marginal rate) |
| Net worth | Total assets minus total liabilities |
| POD/TOD | Payable/Transfer on Death: beneficiary designation that bypasses probate |
| Probate | Legal process of settling a deceased person's estate through the courts |
| QDRO | Qualified Domestic Relations Order: court order splitting retirement accounts in divorce |
| Rebalancing | Adjusting portfolio back to target asset allocation |
| RMD | Required Minimum Distribution: mandatory annual withdrawals from retirement accounts starting at 73 |
| Roth | After-tax contributions, tax-free growth and withdrawals in retirement |
| Sinking fund | Savings set aside monthly for a known future expense |
| Tax-loss harvesting | Selling investments at a loss to offset capital gains and reduce taxes |
| Traditional | Pre-tax contributions, taxed as income when withdrawn in retirement |
| Umbrella policy | Extra liability insurance beyond home and auto limits |
| Vesting | Schedule determining when employer contributions (401k match, RSUs) become fully yours |
| W-4 | IRS form that determines how much tax your employer withholds from your paycheck |
Key Takeaways
- Know the brackets: your marginal rate is not your effective rate
- Max out contribution limits: every dollar in a tax-advantaged account saves you taxes
- Use the deadlines: April 15 for IRA/HSA, December 31 for 401k and conversions
- Run the formulas: compound interest and the Rule of 72 make the case for starting early
- Track your ratios: savings rate, DTI, and housing ratio reveal your financial health at a glance
- Do the annual review: 2-3 hours once a year catches problems before they compound
- Bookmark this page: reference it whenever you need a number, a formula, or a checklist