AE Tax Advisors: When to Seek Help With Multi-State Taxes in 2025

Market Daily Staff on December 30, 2025

By: Mia Reynolds

Why Multi-State Taxes Are More Complicated Than Most People Realize

As remote work grows, businesses expand across state lines, and individuals move more frequently, multi-state tax filings have become increasingly common. Each state has its own rules about residency, income sourcing, business operations, and what constitutes taxable activity. Many taxpayers unknowingly trigger tax obligations in multiple states and only discover the issue when they receive notices or penalties.

Understanding when to seek expert help can prevent costly mistakes and help ensure compliance across all states involved.

Understanding State Residency Rules

Residency determines which state has the right to tax your income. However, residency rules differ by state and may be based on:

Where you live primarily
Where you work
Where you spend more than 183 days
Where you maintain a home
Where your family resides
Driver’s license location
Voter registration
Mailing address
Financial account location

Some states consider you a resident even if you only maintain a home there but work elsewhere. If you have ties to more than one state, you should seek tax guidance to avoid double taxation.

Income Earned Across Multiple States

If you worked in more than one state or performed services while traveling, your income may need to be allocated between states. Each state has its own method for apportioning:

Wages
Self-employment income
Business income
Commissions
Digital earnings
Gig work
Freelance projects

Without proper allocation, you risk overpaying or underpaying state taxes.

Remote Work Complications

Many people now work for companies located in states where they do not live. This raises questions such as:

Which state taxes my income?
Which state gets withholding?
Do I owe taxes to both states?
Does my employer need to register in my state?
Do temporary trips create a tax requirement?

States have specific remote work rules that can be confusing without professional help. A tax advisor ensures that withholding and reporting are handled correctly.

Owning Real Estate in Multiple States

Real estate creates tax obligations that vary by state. You may owe taxes in states where you:

Own rental property
Earn short-term rental income
Sell real estate
Receive passive income through partnerships

Each state taxes rental income differently, and short-term rental rules vary widely. Proper classification, depreciation, and filing ensure compliance.

Operating a Business With Multi-State Activity

Business owners often trigger multi-state tax obligations without realizing it. You may need help if your business:

Has employees in other states
Works with contractors across state lines
Stores inventory in another state
Runs ads targeting specific states
Ships products to multiple states
Has remote workers
Uses third-party fulfillment services
Generates revenue from other states

These activities may create a nexus, meaning your business is legally required to file in that state. Failing to file can lead to penalties, interest, and forced compliance reviews.

Understanding Business Nexus Rules

Nexus determines whether a state has the right to tax a business. Nexus can be created through:

Physical presence
Economic activity
Sales thresholds
Employees
Affiliate relationships
Digital activity

Even online businesses can create a nexus simply by meeting sales volume thresholds. A tax advisor reviews your activity and determines where filings are required.

Pass-Through Business Complications

S corporations, partnerships, and LLCs taxed as partnerships often create multi-state tax exposure for owners. Income flows through to your personal return and must be allocated across states where:

Sales occur
Employees work
Property is held
Clients live

Proper apportionment prevents double taxation and ensures fairness.

Moving Mid-Year

If you moved to another state in the middle of the year, you may need to file part-year returns in both states. This requires:

Allocating income
Adjusting withholding
Reviewing tax credits
Understanding reciprocity agreements

Moving is one of the most common situations where people accidentally overpay or underpay taxes.

Short-Term Rentals Across States

Short-term rental income is taxed differently depending on the state. Requirements vary in:

Occupancy tax
Sales tax
Licensing rules
Depreciation
Material participation
Classification for federal tax purposes

If you operate rentals in more than one state, multi-state tax help becomes essential.

Common Problems Without Professional Guidance

Multi-state taxpayers often face:

Double taxation
Incorrect withholding
Unreported income in other states
Penalty notices
Amended return requirements
Conflicts between residency and domicile
Misapplied credits
Missed deductions
Incorrect apportionment

These problems can snowball quickly because states share information with the IRS.

Documenting Multi-State Activity

To remain compliant, you need clear records of:

Where you worked
Where you lived
Days spent in each state
Contracts
Invoices
Travel records
Rental income
Business receipts
Withholding statements

Proper documentation supports your filing position and prevents disputes.

How AE Tax Advisors Helps With Multi-State Tax Issues

AE Tax Advisors helps clients navigate multi-state tax complexities through:

Residency analysis
Income allocation
Nexus determination
Business apportionment
Short-term rental classification
Payroll adjustments
State tax credit reviews
Multi-state business filings
Amended return support

The firm builds a strategy tailored to your activity in each state to help ensure accuracy and compliance.

Final Thoughts

Multi-state taxes are often more complicated than taxpayers expect. Income earned across state lines, remote work arrangements, real estate ownership, and business operations can all trigger filing requirements. With proper guidance, you can avoid double taxation, stay compliant, and reduce your overall tax burden. For high-income individuals who want a strategic partner steering their tax planning, more information is available at AETaxAdvisors.com.

Disclaimer: The information provided in this article is for general informational purposes only and should not be construed as tax advice. Each individual’s tax situation is unique, and it is recommended to consult with a qualified tax professional or AE Tax Advisors for personalized guidance based on your specific circumstances.

Repo Market’s Role in Quarter-End Liquidity Pressures

Repo markets play a pivotal role in short-term funding, enabling institutions to borrow cash by using securities as collateral. As the calendar year draws to a close, firms often face increased liquidity needs to meet regulatory requirements and capital buffers before finalizing quarterly financial reports. This heightened demand for cash inflates repo market activity, which, in turn, signals tightening conditions in broader financial markets.

Historically, quarter-end periods see a spike in repo borrowing, driven by firms’ efforts to boost their liquidity positions. However, this year, the surge has been particularly pronounced, leading to increased scrutiny of the underlying causes and potential ripple effects on market stability.

Impact of Rising Repo Borrowing on Market Liquidity

The surge in repo borrowing during this quarter-end has highlighted the growing liquidity pressures in the financial system. As financial institutions rush to secure short-term funding, the cost of repo transactions also increases. This can have a cascading effect on other areas of the market, particularly Treasury yields, which often respond to shifts in short-term borrowing costs.

For institutional investors, higher repo rates typically signal tightening liquidity conditions, making it more difficult to secure short-term financing at favorable rates. This could result in higher borrowing costs for companies, which may eventually filter into credit markets, particularly impacting companies dependent on short-term debt for day-to-day operations.

The Fed’s Response to Repo Market Stress

The Federal Reserve’s repo facilities have played a crucial role in stabilizing short-term funding markets, particularly during times of increased stress like quarter-end. Over the past few months, the Fed has actively intervened in repo markets to provide liquidity support, ensuring that borrowing costs don’t spike too dramatically and destabilize the financial system.

Quarter‑End Liquidity Stress Spurs Repo Market Surge

Photo Credit: Unsplash.com

Despite these interventions, however, the continued reliance on Fed liquidity tools highlights the vulnerability of the system, especially as we head into an environment of higher interest rates and growing inflationary pressures. While these tools are effective in the short term, they may not address the structural liquidity risks facing financial markets, which could require deeper, more comprehensive solutions from policymakers.

Potential Risks for the Broader Market

As the repo market surge unfolds, market participants should be cautious of the potential spillover effects into other financial sectors. While the repo market itself may seem distant from the broader stock market or bond market, the dynamics of short-term liquidity often influence investor sentiment and risk appetite. Increased borrowing in the repo market could signal that financial institutions are feeling the strain of liquidity pressures, which may trigger broader risk aversion in equities and bonds.

In addition, the tightening of liquidity in the repo market can influence the supply and demand dynamics for corporate debt, particularly for high-yield issuers that depend on short-term funding. As borrowing becomes more expensive and harder to come by, companies may struggle to refinance debt or access the capital they need to sustain growth, potentially leading to increased defaults and market volatility in 2026.

Monitoring Repo Market Trends Ahead of 2026

Looking forward, it is critical for market participants — from investors to policymakers — to monitor repo market trends closely, as they provide valuable insight into broader liquidity conditions. As we enter the new year, central bank policies will remain a crucial factor in determining the direction of short-term funding markets.

Moreover, investors should prepare for potential market volatility driven by further liquidity strain, as banks and financial institutions adjust to higher capital requirements and navigate the challenges posed by higher interest rates and ongoing inflationary pressures. While the repo market surge may ease as quarter-end pressures dissipate, the underlying issues of liquidity tightness are likely to persist in the coming months.

The repo market surge in response to quarter-end liquidity stress underscores the fragility of short-term funding conditions in the face of regulatory and market pressures. As financial institutions scramble to secure funding ahead of year-end reporting deadlines, repo borrowing spikes, highlighting the potential for wider market disruptions. While the Federal Reserve’s interventions have provided some short-term relief, the underlying liquidity vulnerabilities in the market remain a concern for investors and policymakers heading into 2026. Investors should remain vigilant as liquidity dynamics continue to shape market conditions in the coming year.