CALCMONEY // GUIDES // PAGE 18 OF 20
Blog.
Numbers-first guides on mortgages, taxes, retirement, and net worth. No opinions, no fluff.
Pension vs Lump Sum Calculator: Should You Take the Monthly Check or the Big Number?
Your employer offers $1,200/month for life or a $215,000 lump sum. Which is worth more? The break-even age is 75. If you live longer, the pension wins. Here is how to calculate your specific trade-off.
Freelancer Quarterly Tax Calculator: How Much to Set Aside Every Month
Freelancers pay self-employment tax (15.3%) plus income tax. On $80,000 net freelance income, the total federal tax bill is $19,600. Here is how to calculate what to set aside and when to pay.
Home Equity Loan vs HELOC Calculator: Which One Costs Less?
A home equity loan gives you a fixed rate and fixed payment. A HELOC gives you flexibility but a variable rate that can rise. On $50,000 borrowed over 10 years, the rate difference between them could cost $8,000. Here is how to choose.
W-4 Withholding Calculator: Stop Giving the IRS a Free Loan
The average tax refund is $3,170. That is a free loan to the government. Adjust your W-4 and get $264 extra in every monthly paycheck instead. Here is exactly how to fill out the 2026 W-4.
Student Loan Refinance Calculator: When Refinancing Saves Money and When It Does Not
Refinancing $60,000 in student loans from 7.5% to 5.2% saves $14,000 in interest over 10 years. But refinancing federal loans means losing income-driven repayment and loan forgiveness. Here is how to decide.
Cap Rate Calculator: The One Number That Tells You If a Rental Property Is Worth Buying
A property with a 7% cap rate returns $7 of net operating income for every $100 of value. A 4% cap rate property is priced for appreciation, not income. Here is how to calculate cap rate and what it tells you.
Bonus Tax Calculator: Why Your $10,000 Bonus Only Puts $6,500 in Your Account
Bonuses are withheld at 22% federal plus FICA plus state. A $10,000 bonus with 22% federal + 6.2% Social Security + 1.45% Medicare + 5% state = $3,465 in taxes. Here is the full breakdown.
House Hacking Calculator: How to Get Paid to Own Your Home
Buy a duplex for $400,000, live in one unit, rent the other for $1,800. Your out-of-pocket housing cost drops from $2,600 to $800 per month. Here is the math on house hacking and how to get started.
ETF Expense Ratio Calculator: The Silent Fee That Costs You $97,000
A 0.03% expense ratio on a $500,000 portfolio costs $150/year. A 1.0% expense ratio on the same portfolio costs $5,000/year. Over 25 years, the difference compounds to $97,000. Here is the math.
Balance Transfer Calculator: Is a 0% APR Offer Actually Worth It?
A 0% balance transfer on $8,000 in credit card debt saves $1,900 in interest over 18 months. But the 3% transfer fee is $240. Here is how to calculate whether the deal makes sense.
Inheritance Calculator: What You'll Actually Receive After Taxes
Federal estate tax only hits estates over $13.61M. But six states still have inheritance taxes. Here's how much you'll keep from a $500K inheritance in different states.
401k Contribution Limit Calculator: How to Max Out and What It Saves You
Maxing your 401k at $23,500 on a $100,000 salary saves $5,170 in federal taxes this year. Over 30 years, the tax-deferred compounding adds $380,000 vs. a taxable account. Here is the full math.
Social Security Break-Even Age Calculator: When to Claim for Maximum Lifetime Income
Claim at 62 and get $1,400/month. Wait until 70 and get $2,480/month. The break-even age is 80. If you live past 80, delaying wins. Here is how to calculate your specific crossover point.
Personal Loan vs Credit Card Calculator: Which Costs Less for Large Purchases?
A $10,000 purchase on a 24% credit card costs $6,200 in interest over 5 years. A personal loan at 11% costs $3,000. That $3,200 difference is real. Here is when each option wins.
529 vs Roth IRA for College Savings: Which Account Wins?
A 529 gives you state tax deductions upfront. A Roth IRA gives you flexibility if your kid does not go to college. For most families the answer depends on whether you have maxed your own retirement first.
Dollar Cost Averaging Calculator: Why Boring Wins the Long Game
Investing $500 per month in an S&P 500 index fund for 25 years produces $486,000 at 7% average returns. The investor who tried to time the market produced $310,000 in most studies. Here is why.
Roth Conversion Ladder Calculator: The Early Retirement Tax Strategy
Early retirement at 45 with $1.2M in a traditional 401k. Converting $60,000/year costs $5,200 in tax (8.7% effective rate) vs. 32-36% combined tax-plus-penalty on a direct early withdrawal. Here is the exact calculation.
HSA Triple Tax Advantage Calculator: The Best Tax Break in the US Tax Code
An HSA gives you a tax deduction going in, tax-free growth, and tax-free withdrawals for medical expenses. No other account does all three. Here is how to calculate what that is worth over 20 years.
Debt Payoff Calculator: How Extra Payments Slash Your Timeline
An extra $200 per month on a $20,000 credit card at 21% cuts the payoff from 10 years to 4 years and saves $9,600 in interest. Here is exactly how extra payments work and where to find the money.
Debt Snowball vs Avalanche Calculator: Which Saves More Money?
The debt avalanche saves $1,300 more in interest than the snowball on typical debt. But the snowball wins for most people because it is the only one they actually finish. Here is how to calculate both.
Gross vs Net Savings Rate: Which One Should You Use?
The gross savings rate uses your pre-tax income. The net savings rate uses take-home pay. The same behavior produces a 22% gross rate and a 31% net rate. Here is which one matters and why.
What Savings Rate Do You Need to Retire in 10 Years?
Retiring in 10 years requires a 65% savings rate from zero, or less if you already have a portfolio. Here is exactly what it takes at different income levels and starting balances.
Savings Rate Calculator: The One Number That Predicts When You Retire
Your savings rate determines when you retire more than any other variable. A 10% savings rate means 40+ years of work. A 50% savings rate means 17. Here is how to calculate yours and what it means.
Barista FIRE Calculator: The Math Behind Semi-Retirement
Barista FIRE means working part-time to cover basic expenses while your portfolio covers the rest. With $800,000 invested and $20,000 in part-time income, you can retire 8 years earlier than full FIRE.
Coast FIRE Calculator: How Much to Save Now So You Can Stop Later
Coast FIRE means saving enough now that compound interest carries you to retirement without another dollar contributed. At 30, you need $172,000 invested to coast to $1.5M by 65. Here is the math.
Lean FIRE vs Fat FIRE Calculator: Which Number Is Right for You?
Lean FIRE needs $750,000. Fat FIRE needs $3 million. The gap is not about greed, it is about what retirement actually looks like day to day. Here is how to calculate your version.
FIRE Number Calculator: Exactly How Much You Need to Retire Early
Your FIRE number is 25 times your annual expenses. On $60,000 per year spending, that is $1.5 million. But the 4% rule has conditions most FIRE calculators ignore. Here is the complete calculation.
Mortgage Calculator by State: Why the Same Home Costs $600 More in New Jersey
The same $350,000 home with the same mortgage rate costs $543 more per month in New Jersey than in Alabama. State property taxes make the biggest difference. Here is the breakdown by state.
Mortgage Refinance Break-Even Calculator: Is Refinancing Worth It?
Refinancing costs $3,000 to $6,000 in closing costs. If your monthly savings are $180, your break-even is 22 months. Here is how to calculate whether a refi actually saves money.
First Time Home Buyer Mortgage Calculator: What You Can Actually Afford
Lenders approve you for the maximum they will give. That number is not what you can comfortably afford. Here is how to calculate your real budget before you talk to a lender.
30-Year vs 15-Year Mortgage Calculator: Which Saves More Money?
The 15-year mortgage saves $147,000 in interest on a $300,000 loan. But the higher payment might cost you more in opportunity cost. Here is how to calculate which one actually wins.
Mortgage Calculator with PMI: The Real Cost of Less Than 20% Down
Put 10% down on a $400,000 home and you owe an extra $233 per month in mortgage insurance. Here is how PMI works, how much it costs, and exactly when it disappears.
PITI Mortgage Calculator: What Your Actual Monthly Payment Looks Like in 2026
The interest rate your lender quotes is not your monthly payment. Add property taxes, insurance, and PMI and the number changes by hundreds. Here is the full PITI breakdown.
Military Retirement Pay Calculator: BRS vs Legacy, What You'll Actually Receive
Military retirement pay depends on which system you're under. Legacy High-3 vs Blended Retirement System (BRS) produce different numbers. Here's the real math.
FICA Tax Calculator: What You Pay for Social Security and Medicare in 2026
FICA taxes take 7.65% from employees and 15.3% from the self-employed. Here's the 2026 wage base, Medicare surcharge thresholds, and the net investment income tax.
How Much to Save for a House: A Month-by-Month Calculator
Saving for a home on a $400K purchase requires $80K down plus closing costs plus reserves. Here's a savings timeline for every down payment target and home price.
First-Year Home Ownership Calculator: The Costs Nobody Warns You About
Buying a home costs more in year one than just the mortgage. Closing costs, moving, repairs, and furnishings can add $20,000-$40,000 before you make your second payment.
Debt-to-Income Ratio: The Number That Controls Your Mortgage Approval
Your DTI ratio is the single most important number in your mortgage application. Banks use it to decide how much house you can afford. Here is how to calculate it and what to do if yours is too high.
Cost of Living Comparison: How to Calculate Whether a New City Actually Pays More
A $120,000 salary in Austin is not the same as $120,000 in San Francisco. Before you accept that out-of-state offer, here is how to calculate the real purchasing power difference.
Yield to Maturity Calculator: What Your Bond Is Actually Paying You
Coupon rate and yield to maturity are different numbers. Here's what YTM means, how to calculate it, and why it's the only metric that matters when comparing bonds.
Daily Compound Interest: The Formula Banks Use That You Should Too
Most people understand annual compound interest. But banks compound daily, and that difference matters more than you think. Here is the exact formula and how to use it.
Car Payment Calculator: The Full Math Behind Your Monthly Auto Payment
Dealers love to talk monthly payments instead of total cost. That is how a $30,000 car turns into $42,000. Here is how to calculate your real car payment and total interest before you set foot on a lot.
Jumbo Loan Calculator: What You Need to Qualify for a $1M+ Mortgage
The 2026 conforming loan limit is $766,550. Above that, you're in jumbo territory. Here's what lenders require and what a $1M mortgage actually costs monthly.
Emergency Fund Calculator: How Much Cash You Actually Need Set Aside
The standard advice says 3 to 6 months of expenses. But that range is absurdly wide. Here is how to calculate your specific number based on your actual risk profile.
Down Payment Assistance: How Much Help Can You Actually Get?
Down payment assistance programs offer $10,000 to $100,000+ in grants and forgivable loans. Here's what's available, who qualifies, and how it changes your monthly payment.
Marginal vs. Effective Tax Rate: Why Most People Overpay By Misunderstanding Their Bracket
Getting a raise that pushes you into the next tax bracket does not mean all your income gets taxed at the higher rate. Here is how marginal tax rates actually work and why the confusion costs people money.
Rental Property ROI: How to Calculate Whether an Investment Property Is Worth Buying
Cap rate, cash-on-cash return, and total ROI all measure different things. Most new landlords only look at one and get burned. Here is how to calculate all three and what they actually tell you.
Savings Rate Calculator: The Single Metric That Predicts When You Can Retire
Your savings rate is not just a budgeting metric. It directly determines how many years until you reach financial independence. At 10%, you work for 51 years. At 50%, you work for 17. Here is the math.