Key insights
- Plan under current law rather than waiting for Congress. Divided government may make major tax legislation harder to enact, giving businesses a more stable foundation for 2027 planning.
- Expect greater scrutiny in certain areas. Congressional oversight could put specific transactions, industries, and tax strategies under a brighter spotlight, making documentation and business purpose especially important.
- Watch the guidance, not just the legislation. Treasury and IRS guidance can materially affect when a tax benefit is available, what qualifies, and what documentation is required.
- Model the state impact before making a major investment. A federal tax benefit may produce a very different result at the state level, affecting both cash flow and the economics of an investment.
Stay on top of federal tax changes to plan ahead for 2027.
Heading into 2027, taxpayers should plan under the law we have today, not wait for Washington to act. With Democrats controlling Congress and a Republican in the White House, major tax legislation may be more difficult to enact. But that doesn’t mean your tax situation won’t change.
Congressional oversight, Treasury and IRS guidance, implementation of existing tax law, and state conformity decisions can all change how current provisions affect your business, investments, and cash taxes.
Here are the developments worth watching in 2027, and the planning decisions you can make now.
Discover what tax legislation Congress might propose in 2027, including the Work Opportunity Tax Credit and the semiconductor manufacturing credit.
Why congressional oversight matters to your tax strategy
Congress doesn't need to pass a bill to influence how tax rules are applied. Democratic leaders on tax-writing committees have indicated oversight will be a priority, with IRS operations, multinational and high-net-worth tax strategies, and data centers among the areas that could receive attention. Hearings can draw attention to specific transactions and industries, which may bring closer review of how taxpayers support their positions.
Qualified Small Business Stock guidance
The IRS’s 2026-2027 initial Priority Guidance Plan lists 121 guidance projects, with continued OBBBA implementation a stated focus. It includes forthcoming regulations under section 1202.
Treasury and the IRS have said publicly they are working on QSBS guidance to resolve long-standing issues and post-OBBBA ambiguities. The most likely target is "stacking," where gifts of QSBS to multiple nongrantor trusts multiply the per-taxpayer, per-issuer exclusion.
Other areas of focus could include the treatment of self-created IP contributed in LLC-to-corporation conversions, the preservation of QSBS status through tax-deferred reorganizations, and the eligibility of recapitalizations and other single-entity reorganizations.
Practitioners have also raised questions about how the active business requirement applies to common start-up fact patterns. Because the PGP sets no completion deadlines, the scope and timing of the regulations remain uncertain.
Taxpayers in the areas under review should confirm their documentation and the business purpose behind each position now. Individuals using high-net-worth "tax aware” strategies may face more questions, too.
Treasury and IRS guidance can change how current law applies
The IRS and the U.S. Department of the Treasury continue implementing the One Big Beautiful Bill Act (OBBBA) and other provisions already in the tax code. Even when the tax law itself doesn't change, IRS and Treasury guidance can change how it works in practice.
New regulations and notices may affect timing, eligibility, documentation, and compliance, which can materially change the outcome of a transaction. They can change assumptions about timing, qualification, documentation, and compliance while the statute stays the same.
Bonus depreciation shows how guidance can affect timing and qualification
Bonus depreciation lets a business deduct the cost of qualifying property in the year it’s placed in service, which accelerates deductions that would otherwise be spread over several years.
OBBBA made 100% bonus depreciation permanent for qualifying property acquired and placed in service after January 19, 2025, and businesses across industries rely on it when evaluating equipment and other qualifying capital investments. The statute is settled, but guidance on what qualifies and when property counts as placed in service can still affect how a specific investment is treated.
Why capital investments involve more than one provision
Implementation questions matter most when several provisions affect the same decision, as they do in a capital investment. Cost recovery affects deduction timing, financing may affect the amount of interest currently deductible, and research expenditures can add further considerations for businesses developing products or technology.
Don't evaluate these provisions in isolation. Modeling cost recovery, financing, interest limitations, and research expenditures together can give you a much clearer picture of projected cash taxes and the true economics of an investment. Businesses can keep investing while those questions get answered, and planning can move forward under current law with attention to the assumptions most likely to change.
Federal guidance is expected to be the most immediate source of change in 2027. Organizations making capital investments should build a short list of assumptions dependent on guidance — such as timing and qualification — and revisit it as notices and regulations appear.
International tax rules face changes beyond Congress
Multinational businesses still face changes arising from OBBBA, Treasury and IRS guidance, and tax rules outside the United States, even as divided government limits the path for major U.S. tax legislation.
Current and proposed guidance addresses foreign tax credits, controlled foreign corporations, cross-border income, expense allocation, and transfer pricing. These rules can affect effective tax rates, cash flow, entity structures, and investment decisions, making international tax another area where businesses should continue planning under current law while monitoring implementation.
State tax conformity can impact federal tax changes
A federal tax benefit doesn’t necessarily produce the same benefit in every state. Some states automatically adopt federal tax changes, others conform to the Internal Revenue Code as of a fixed date, and still others depart from the federal treatment of specific provisions.
These differences can affect provisions such as bonus depreciation and research expenditures and can change both the timing and amount of the tax benefit associated with a capital investment. Financing and applicable interest limitations can further affect the result.
For a multistate business, state treatment should be part of the analysis from the start. Model the expected federal and state tax consequences together before committing significant capital rather than addressing state conformity after the investment decision has been made.
Tax planning for what’s next: Explore strategies to help shape your business and personal finance outcomes
How CLA can help with 2027 tax planning
Current law gives businesses and individuals a foundation for planning, while guidance, oversight, and state developments identify the assumptions that need to be monitored.:
As you build your 2027 tax plan:
- Base projections and estimated tax payments on current law
- Identify assumptions that depend on forthcoming guidance, particularly around qualification and timing
- Model federal and state tax consequences together before committing significant capital
- Review documentation and business purpose for transactions or strategies that could receive greater scrutiny
- For multinational businesses, model U.S. and foreign tax changes together rather than treating U.S. legislation as the only source of change
CLA can help you distinguish developments that require action from Washington activity that may not materially affect your plan. We can model the tax consequences of investments and financing decisions, evaluate federal and state treatment together, and help you determine when a change is significant enough to revisit your strategy.
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