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Tax-accurate retirement planning guides, FIRE strategies, and calculator comparisons.
How much do I need to retire? The tax math
The 25x rule ignores taxes. A single filer spending $60K a year needs $1.65-1.84M in a Traditional 401(k), not $1.5M. Here is the real math, worked in full.
72(t) SEPP calculator - retire before 59½
The 10% early-withdrawal penalty blocks most FIRE plans. 72(t) SEPP is the IRS-sanctioned escape - three calculation methods plus the modification trap.
Inherited IRA RMD rules for beneficiaries
Most non-spouse beneficiaries must empty inherited IRAs within 10 years. If the owner died after RMDs began, annual distributions are also required from 2025.
Roth conversion calculator - how much to convert
The optimal Roth conversion fills your lowest tax brackets without tripping ACA subsidies, IRMAA surcharges, or Social Security taxation. The exact math.
RMD calculator - required minimum distributions
Divide your December 31 account balance by the IRS Uniform Lifetime Table factor for your age. At 73, the factor is 26.5 — a $500K IRA owes an $18,868 RMD.
Capital gains stacking - the 0% bracket move
Long-term gains stack on ordinary income and fill a 0% bracket first, up to $96,700 MFJ in 2025. Flat-15% calculators miss early retirement's best tax move.
One More Year: The Math Behind Working Longer
Each extra year of work adds three things. The first year shifts a 90% success rate to 94-95%. The fifth year barely moves the needle — here's where your personal curve breaks.
Coast FIRE Calculator: When Can You Stop Saving?
Coast FIRE is the point where your existing investments will grow to cover retirement without additional contributions. Here's how to calculate yours.
Best Retirement Calculators Compared (2026)
Every 'best retirement calculator' list ranks tools by UI. We ranked the top 8 on what actually matters: tax handling, Social Security modeling, scenario complexity, and Monte Carlo methodology.
FIRE number calculator - what the formula misses
Annual expenses × 25 is the napkin formula for your FIRE number. After taxes, time horizon, and healthcare adjustments, the real number runs 25-40% higher.
Tax-Efficient Retirement Withdrawal Strategies
The optimal withdrawal strategy combines taxable account spending with Roth conversions to fill low tax brackets — saving $100,000–300,000+ vs. the conventional sequential approach.
When to Claim Social Security: Break-Even Analysis
The pre-tax break-even for claiming SS at 62 vs. 70 is age 80. After accounting for how benefits interact with other income for taxes, that number shifts by 6-12 months.
Roth Conversion Ladder: Complete Guide for Early Retirees
A Roth conversion ladder lets you access pre-tax retirement funds before 59½ without penalties. Here's the strategy, the math, and the tax traps to avoid.
Why Most Retirement Calculators Get Taxes Wrong
Most retirement calculators use flat tax rates or ignore taxes entirely. Here's what they miss and why it costs you tens of thousands in bad planning.
7 best retirement planning apps for iPhone (2026)
The best retirement app depends on what you do on your phone. Quick scenario checks favor native iOS tools; multi-account planning belongs on desktop.
Retirement tax planning - 7 strategies
These 7 retirement tax strategies interact - one Roth conversion moves ACA subsidies, IRMAA, and Social Security tax at once. Sequencing is everything.
Guardrails withdrawal strategy - spend flexibly
Guyton-Klinger guardrails support a 5-5.5% starting withdrawal rate. Cut spending 10% when the rate drifts 20% above the start; raise 10% when 20% below.
Bucket Strategy for Retirement: 3-Bucket Approach Explained
The 3-bucket retirement strategy divides your portfolio by time horizon — cash, bonds, stocks. Research shows it works behaviorally, not mathematically. Here's how to set it up and when it actually helps.
7 best Monte Carlo retirement calculators (2026)
We tested 7 Monte Carlo retirement calculators on what matters: correlated returns, spending flexibility, and tax modeling inside each simulation path.
Social Security Tax Calculator: How Benefits Get Taxed
Up to 85% of Social Security benefits are federally taxable, based on provisional income thresholds frozen since 1983. Here is the formula, the tax torpedo, and how to minimize it.
Required Minimum Distribution Rules: Age, Deadlines, Penalties
Under SECURE 2.0, required minimum distributions start at age 73 (born 1951–1959) or 75 (born 1960+), with a reduced 25% penalty for missed distributions and no RMDs for Roth 401(k)s.
The 4% Rule Is Wrong: What Monte Carlo Shows
The 4% rule was designed for 30-year retirements. Monte Carlo simulation shows a 15-20% failure rate over 50 years. Here's what actually works for early retirees.