New here? Start with these four steps
If you have never dealt with capital gains tax before, you do not need to read all 37 guides. This short path takes about 20 minutes and covers everything most investors actually need before they sell something.
- 1Learn the basics in Capital Gains Tax for Beginners — what triggers a taxable gain.
- 2Find out whether your sale is long-term or short-term. The difference can be 20 points.
- 3Run your numbers with the free calculator, then check your state's rate.
- 4Look for savings in How to Avoid Capital Gains Tax before you pull the trigger.
- 5Have a specific question? The Capital Gains Tax FAQ answers 41 of the most common ones in a few sentences each.
What you will learn here
Capital gains tax is one of the few taxes where your own timing decisions change the bill. Hold an asset for 366 days instead of 364 and the same profit can move from your ordinary income rate down to 0%, 15% or 20%. Sell in a low-income year, pair a winner with a loser, or inherit rather than receive a gift, and the math shifts again. That is what this Learning Center exists to explain: not just the rates, but the decisions that sit underneath them.
The library is grouped into eight sections. Fundamentals covers the mechanics — holding periods, cost basis methods such as FIFO and specific identification, and how gains actually land on Schedule D and Form 8949. Tax Planning & Strategy moves into the levers you control: tax-loss harvesting and the 30-day wash sale rule, asset location across taxable and tax-advantaged accounts, bracket management, and how gains interact with retirement withdrawals, Social Security taxation and Medicare IRMAA surcharges.
Specific Situations handles the cases that break the simple rules — the Section 121 home sale exclusion, depreciation recapture on rentals, 1031 exchanges, crypto's lack of wash sale protection, the stepped-up basis on inherited property, and community property rules for married couples. 2026 Updates tracks the current-year brackets and inflation adjustments so you are not planning against last year's thresholds.
Beyond capital gains, we cover the other big numbers in a household budget: mortgages (payment math, 15 vs 30 year, refinance break-even), paychecks (withholding, FICA, bonus taxation, pre-tax deductions) and car loans (affordability, 0% APR versus rebates, lease versus buy). Every guide is free, works without an account, and pairs with a calculator so you can test the idea against your own numbers instead of taking our word for it.
Capital Gains Tax Fundamentals
5 guides · Start hereThe core mechanics every investor should know before selling: what counts as a gain, how holding periods split the rate schedule, how to track cost basis, and where the numbers go on your return.
Capital Gains Tax for Beginners
A ground-up introduction: realized versus unrealized gains, what triggers a taxable event, the 0%/15%/20% rate structure, and the vocabulary you will meet everywhere else on this site.
Read the guide → Rates & bracketsLong-Term Capital Gains Tax
Assets held more than one year get preferential rates. See the 2026 income thresholds for each filing status, the 0% bracket sweet spot, and how the 3.8% NIIT stacks on top.
Read the guide → Rates & bracketsShort-Term Capital Gains Tax
Sell within a year and your profit is taxed as ordinary income — up to 37%. How the brackets work, why day traders pay more, and when waiting a few extra weeks pays for itself.
Read the guide → RecordkeepingCost Basis Methods Explained
FIFO, LIFO, average cost and specific identification — how each one changes your taxable gain, which your broker uses by default, and how to elect a different lot before you sell.
Read the guide → FilingHow to Report Capital Gains on Your Tax Return
A walkthrough of Form 8949 and Schedule D, matching your 1099-B, handling missing basis, carrying losses forward, and avoiding the mismatches that trigger IRS notices.
Read the guide →Tax Planning & Strategy
4 guides · Reduce your billThe legal levers that actually move the number: loss harvesting, bracket management, asset location, account sequencing and multi-year planning around a large sale.
How to Avoid Capital Gains Tax
Twelve legitimate strategies ranked by how much they typically save — from holding past one year and filling the 0% bracket to charitable gifting, opportunity zones and step-up planning.
Read the guide → StrategyTax-Loss Harvesting: The Complete Guide
Turn paper losses into a real deduction. Offsetting rules, the $3,000 ordinary income cap, indefinite carryforwards, and how to stay clear of the 30-day wash sale trap.
Read the guide → StrategyInvestment Tax Planning Strategies
Asset location across taxable, traditional and Roth accounts; tax-efficient funds versus actively traded ones; qualified dividends; and how to sequence sales across tax years.
Read the guide → RetirementCapital Gains Tax & Retirement Planning
Why the gap between retiring and starting RMDs is the best window for gain harvesting and Roth conversions — plus how gains affect Social Security taxation and Medicare IRMAA tiers.
Read the guide →Specific Situations
5 guides · Special rulesReal estate, crypto, inheritances and marriage each get their own rulebook. These guides cover the exclusions, recapture rules and basis quirks the general guides do not.
Capital Gains Tax on Real Estate
Investment property from purchase to sale: adjusted basis and capital improvements, 25% depreciation recapture, 1031 exchanges, installment sales and passive loss rules.
Read the guide → PopularCapital Gains Tax on a Home Sale
The Section 121 exclusion lets many sellers exclude $250,000 (single) or $500,000 (joint) of gain. Ownership and use tests, partial exclusions, and what happens above the cap.
Read the guide → Digital assetsCrypto Capital Gains Tax
Every trade, swap and purchase is a disposal. Basis tracking across wallets and exchanges, staking and airdrop income, why wash sale rules do not protect crypto, and 1099-DA reporting.
Read the guide → EstatesCapital Gains Tax on Inherited Property
Stepped-up basis often erases decades of appreciation. Date-of-death valuation, the automatic long-term holding period, community property double step-up, and selling an inherited home.
Read the guide → Filing statusCapital Gains Tax for Married Couples
Joint brackets are roughly double, but not always better. Filing jointly versus separately, the doubled home sale exclusion, transfers between spouses and community property states.
Read the guide →2026 Updates
1 guide · Current yearRates hold steady at 0%, 15% and 20%, but the income thresholds move with inflation every year. This is where we track what changed.
Capital Gains Tax Changes 2026
New long-term brackets side by side with 2025, the higher standard deduction, unchanged NIIT thresholds, estimated payment due dates, and how much more you can now shelter at 0%. Based on IRS Rev. Proc. 2025-32.
Read the guide → ReferenceState Capital Gains Tax Rates
All 51 jurisdictions compared, from the nine states with no income tax to California's 13.3% top rate — each with its own page and combined federal-plus-state math.
Browse states →Mortgage Guides
7 guides · Home financingPayment math, term selection, payoff acceleration and refinance decisions — each one paired with the mortgage calculator so you can test it against your own loan.
How to Calculate a Mortgage Payment
The amortization formula worked step by step, plus the escrow items — taxes, insurance, PMI, HOA — that turn principal and interest into your real monthly payment.
Read the guide → Comparison15-Year vs 30-Year Mortgage
Lower payment or far less interest? A side-by-side on total cost, rate spread, cash-flow flexibility and the case for a 30-year note with voluntary extra payments.
Read the guide → BudgetingHome Affordability: The 28/36 Rule
How lenders judge front-end and back-end DTI, what income and debts count, and why the amount you qualify for is usually more than the amount you should borrow.
Read the guide → PayoffExtra Mortgage Payments Guide
Where an extra $100 a month lands, how principal-only payments compress the schedule, and when paying down the loan beats investing the same dollars.
Read the guide → PayoffBi-Weekly Mortgage Payment Benefits
Twenty-six half-payments equal thirteen monthly ones, cutting years off a 30-year loan. How to set it up correctly and which servicer fees make it not worth it.
Read the guide → RefinancingRefinance Break-Even Guide
Closing costs divided by monthly savings gives your break-even month — and why resetting the clock on a seasoned loan can cost more than the lower rate saves.
Read the guide → RefinancingMortgage Recast vs Refinance
A recast re-amortizes your existing loan after a lump sum for a few hundred dollars. When that beats a full refinance, and when it does not.
Read the guide →Paycheck Guides
7 guides · Take-home payWithholding, FICA, deductions and bonus taxation explained line by line. Pair them with the paycheck calculator and your state's page.
How to Read Your Paycheck
Every line on a pay stub decoded — gross versus net, each withholding code, YTD totals, and the most common errors worth disputing with payroll.
Read the guide → WithholdingFederal Income Tax Withholding Guide
How Form W-4 drives the amount taken out, the percentage and wage-bracket methods, and how to dial in withholding so you neither owe nor over-lend the IRS.
Read the guide → FICASocial Security & Medicare Taxes
The 6.2% and 1.45% split, the annual Social Security wage cap, the 0.9% Additional Medicare Tax on high earners, and how self-employment doubles your share.
Read the guide → DeductionsPre-Tax vs Post-Tax Deductions
401(k), HSA, FSA and premium deductions cut taxable wages; Roth contributions and garnishments do not. What each one does to your net pay.
Read the guide → Supplemental payHow Are Bonuses Taxed?
The 22% flat supplemental rate is withholding, not your final tax. Percentage versus aggregate methods, the 37% tier above $1M, and how it settles at filing.
Read the guide → ComparisonSalary vs Hourly Take-Home Pay
Converting between the two honestly — overtime eligibility, unpaid time off, benefit value and the exempt classification rules that decide which you are.
Read the guide → StrategyHow to Reduce Taxes on Your Paycheck
Maximize pre-tax accounts, use commuter and dependent care benefits, fix a stale W-4, and consider state residency — ranked by dollars saved.
Read the guide →Car Loan Guides
7 guides · Auto financingAffordability, dealer incentives, leasing and refinancing — the arithmetic behind the finance office pitch. Test any of it in the car loan calculator.
How Much Car Can I Afford?
The 20/4/10 rule and total cost of ownership: insurance, fuel, maintenance, registration and depreciation, not just the monthly payment.
Read the guide → FundamentalsCar Loan Amortization Explained
Why early payments are mostly interest, how longer terms create negative equity, and how to read your payoff schedule month by month.
Read the guide → ShoppingHow to Get the Best Car Loan Rate
Credit tiers and typical APRs, why pre-approval from a credit union changes the negotiation, dealer rate markup, and rate shopping without wrecking your score.
Read the guide → Incentives0% APR vs Cash Rebate
Dealers make you choose. The break-even math on 0% financing versus taking the rebate and financing elsewhere, with worked examples at several loan sizes.
Read the guide → ComparisonLease vs Buy a Car
Money factor, residual value and capitalized cost translated into plain numbers — plus mileage limits, wear charges and the long-run cost of perpetual leasing.
Read the guide → ComparisonNew vs Used Car Loan
Used cars cost less but carry higher rates and shorter terms. How the first-year depreciation cliff, certified pre-owned programs and warranties change the total.
Read the guide → RefinancingCar Loan Refinancing Guide
When a better score or lower rates make refinancing worth it, how to avoid extending the term into negative equity, and the fees to watch for.
Read the guide →Calculator Guides
1 guide · How-toGetting accurate output starts with accurate input. These walkthroughs show exactly which figures to enter and how to read the results.
How to Use the Capital Gains Calculator
Field-by-field instructions: purchase and sale prices, adjusted cost basis, holding period, filing status, other income and state selection — plus how to interpret the effective rate, NIIT line and after-tax proceeds.
Read the guide → ToolCapital Gains Tax Calculator
Estimate federal and state tax on a sale in about thirty seconds. Free, no account, nothing to install — and your inputs stay in your browser.
Open the calculator →How we research and maintain these guides
Tax content is only useful if it is current and traceable to a primary source. Every rate, bracket and threshold on this site comes from IRS publications, revenue procedures and state revenue department releases — not from other websites. When a figure changes, we update the guide and record the revision date.
Primary sources only
IRS forms, instructions and revenue procedures, plus official state revenue department publications, cited in the guide itself.
Dated and revised
Each guide carries a published and last-modified date so you can see whether it reflects the current tax year.
No paid placement
We do not sell rankings, mentions or links. Advertising is clearly labelled and never influences editorial content.
Estimates, not advice
Our tools are for planning and estimation. They do not replace a CPA or enrolled agent reviewing your specific situation.
Our full methodology — data sources, calculation assumptions, known limitations, correction policy and how to report an error — is published in the open.
Read our Editorial Policy →Ready to run your own numbers?
Reading is the first half. Put your actual purchase price, sale price and filing status into the calculator and see the federal and state tax before you sell.
Published 2026-01-01 · Last updated 2026-08-16 · Reviewed by the CapitalCalc editorial team