Warren Wu
Nino Tax Lead
Warren Wu, CPA, is Nino's tax lead. He has 10 years of tax-advisory experience with complex individual and business returns.
A decade
untangling complex individual and business returns as a tax advisor.
Acquired
the tax software Warren spent 5 years building.
18
Nino articles Warren reviewed for accuracy.
What Warren reviews
The topics of the Nino articles Warren checks for accuracy.
- Tax planning
- Retirement planning
- Equity compensation
- High earners
- Modified adjusted gross income
- Business owners
- Charitable giving
- SEP IRA
- Year-end tax planning
- 401(k) contributions
Reviewed by Warren
Warren reviewed each of these for accuracy. An article’s updated date records a later content edit, not a new review.
2026 Tax Changes: What to Do Before December 31
The One Big Beautiful Bill Act changed SALT, charitable, QSBS, and AMT rules for 2026. What changed, who it affects, and what to do by December 31.
Tax and Financial Deadlines for 2026 and Early 2027: The Full Calendar
Every date from October 2026 to April 2027: estimated taxes, December 31 moves, tax forms, IRA and HSA deadlines, and life-event clocks that run on their own.
How Much Can You Inherit Without Paying Taxes in 2026?
There is no federal inheritance tax, and estates under $15 million owe no federal estate tax in 2026. Five states tax heirs, and inherited IRAs are taxed.
How Much Does a CPA Cost to Do Your Taxes in 2026?
CPAs average $280 for a basic Form 1040 in NATP's 2025 study. See what schedules, states, K-1s, equity pay, and crypto add, and how EAs and software compare.
SEP IRA: 2026 Contribution Limits, Rules, and Pros and Cons
A SEP IRA lets a business owner contribute up to 25% of pay, capped at $72,000 for 2026. Here is the self-employed math, the employee rule, and the deadlines.
Solo 401(k) vs SEP IRA: Which Saves More in 2026?
A Solo 401(k) beats a SEP IRA at most incomes because it adds a $24,500 employee deferral and catch-ups. See the 2026 math at $60K, $150K, and $300K.
What Is Taxable Income? Definition and Example
Taxable income is income after eligible adjustments and deductions. See how it differs from gross income, AGI, and the tax you owe.
Roth IRA Contribution and Income Limits for 2026
The 2026 IRA contribution limit is $7,500, or $8,600 at age 50+. Income and contributions to other IRAs may reduce your Roth IRA allowance.
HSA Contribution Limits for 2026
The 2026 HSA limit is $4,400 for self-only coverage or $8,750 for family coverage. Eligibility, employer deposits, and Medicare can change your limit.
What Is Tax-Loss Harvesting?
Selling an investment at a loss can offset taxable gains. Learn the steps, see an example, and avoid wash-sale mistakes.
What Is the Net Investment Income Tax (NIIT)?
NIIT is a 3.8% tax on certain investment income above income thresholds. See who pays, what counts, and how to calculate it.
Mega Backdoor Roth 401(k): A Planning Guide for High Earners
Before you fund a mega backdoor Roth, answer three questions: how much to contribute, when to convert, and whether you have cash on hand for taxes.
401(k) Contribution Limits for 2026
The 2026 employee limit is $24,500. See age-based catch-ups, employer contribution limits, and the Roth catch-up rule.
Backdoor Roth IRA for High Income: A Year-End Planning Guide
A backdoor Roth stays open at any income. What decides the tax bill is the order of the two steps, the month they happen in, and what else sits in your IRAs.
What Is MAGI? How It Differs From AGI
Modified adjusted gross income starts with AGI, then changes for the tax or benefit being tested. Compare the Roth IRA, NIIT, Medicare, and Marketplace definitions.
Tax Strategies for High-Income W-2 Employees: 2026 Guide
High earners cut their tax bill by coordinating retirement accounts, equity compensation, charitable giving, and the timing of income, not by chasing a single deduction.
Do Roth Conversions Count as Income?
The taxable part of a Roth conversion adds to ordinary income. See how basis, tax brackets, Medicare premiums, and other income tests affect the decision.
529 Plan Changes: Education Uses and Roth Rollovers
529 plans offer more education uses and a limited Roth rollover option. Check account age, contribution limits, and state treatment before moving money.
