Cost Segregation Studies in Massachusetts: Save 20 to 40% on Taxes

A cost segregation study is an engineering-based tax analysis that reclassifies components of your real estate from the standard 27.5- or 39-year depreciation schedules into shorter 5-, 7-, or 15-year categories. This accelerates your depreciation deductions, significantly reducing your taxable income in the early years of ownership. Massachusetts property owners typically see first-year savings ranging from $30,000 to several million dollars, depending on property size.

Any income-producing property with a depreciable building basis of $300,000 or more qualifies. This includes single-family rentals, multi-family properties, apartment complexes, commercial office buildings, retail centers, hotels, industrial facilities, self-storage warehouses, medical offices, restaurants, and short-term rentals on platforms like Airbnb. Massachusetts properties across Boston, the South Shore, Cape Cod, and beyond are all eligible.

Study fees vary based on property size and complexity. Entry-level properties ($300K–$1M) typically range from $3,000–$12,000; medium properties ($1M–$3M) from $10,000–$20,000; large properties ($3M–$10M) from $15,000–$30,000; and very large properties ($10M+) from $30,000–$60,000+. ROI ratios typically range from 10:1 to 25:1, and every study includes a free preliminary savings estimate so you can confirm the numbers work before committing.

Yes. A lookback cost segregation study allows you to capture all missed depreciation on properties placed in service up to 15 years ago without amending prior tax returns. Using IRS Form 3115, all backdated deductions are claimed in a single current tax year. The process and cost are essentially the same as a standard study, and the savings can be substantial even for older acquisitions.

Seneca completes most studies within 2–4 weeks, roughly twice as fast as the industry standard of 4–8 weeks. Virtual property tours, which take 30–45 minutes via video call, typically produce results in 2–3 weeks. For clients with urgent tax deadlines, rush service is available and can deliver a completed study in as little as one week, with adjusted pricing based on the turnaround required.

Cost segregation is a well-established, IRS-recognized tax strategy when performed by qualified engineers following proper methodology. Seneca's engineering-based approach strictly adheres to IRS guidelines, resulting in a low audit risk profile. Additionally, every study includes the Seneca AuditDefense guarantee at no extra cost covering you for the entire duration of property ownership, with a potential study-cost refund if a material issue ever arises.

No. Seneca works alongside your existing CPA or tax advisor. After delivering your study, our team coordinates directly with your accountant to review the report, implement depreciation schedules into your current or prior-year returns, and provide Form 3115 support where needed. This post-study CPA coordination is included at no additional charge, ensuring seamless integration into your existing tax strategy.

Seneca's average client achieves a first-year deduction of $171,243. ROI ratios typically range from 10:1 to 25:1 meaning for every dollar spent on the study, clients typically recover $10–$25 in tax savings. Actual savings depend on the property's depreciable basis, asset type, and your individual tax situation, which is why we provide a free preliminary savings estimate before any commitment is made.

Technically, yes. The IRS Cost Segregation Audit Techniques Guide says there are no prescribed qualifications for someone who prepares a study. The same guide notes that a preparer's credentials affect accuracy, and that a study by a construction engineer is generally more reliable than one by someone without engineering or construction experience. A do-it-yourself allocation also needs the documentation an examiner expects: the methodology used, cost support, a list of assets classified as section 1245 or 1250 property, and a reconciliation to the total cost basis. Weak support is the usual reason an allocation is challenged.

It depends on four things. First, the size of the depreciable basis, since the fee is fixed but the deduction scales with cost. Second, whether you can use the deduction now: rental losses are passive unless you qualify as a real estate professional or another exception applies, and the $25,000 special allowance phases out between $100,000 and $150,000 of modified AGI. Third, how long you plan to hold, because faster depreciation is partly recaptured when you sell. Fourth, your marginal tax rate now versus at sale.

Massachusetts does not allow federal bonus depreciation under Section 168(k) for either the personal income tax or the corporate excise. Owners keep a separate Massachusetts depreciation schedule, figured as if bonus had not been claimed, so reclassified 5-, 7- and 15-year assets are written off over those lives on the state return, and the state basis is tracked separately for when you sell. For Section 179, a 2026 state law (St. 2026, c. 101) disallows the higher federal limits from the One Big Beautiful Bill Act for tax years beginning in 2025 and 2026. Massachusetts adopts the higher limits from 2027.

Illustrative only, not a client result. Assume a residential rental acquired after January 19, 2025 with a $1,000,000 depreciable building basis (land excluded), a study that moves 25% ($250,000) into 5-, 7- and 15-year property, and a 37% federal bracket. With 100% bonus depreciation, the $250,000 can be deducted in year one, compared with roughly $36,000 a year if the whole basis stayed on a 27.5-year schedule. If the owner can use the loss, that is up to about $92,500 of federal tax deferred. On the Massachusetts return, bonus is not allowed, so the $250,000 is depreciated over its 5-, 7- and 15-year lives.