Orthodontist Financial Planning: Tax, Retirement & Practice Guide (2026)

Orthodontists are among the highest earners in dentistry — the ADA Health Policy Institute's 2024 survey put average net income at $368,000, with top practices in high-demand markets clearing $600,000 or more.¹ But orthodontic financial planning is different from GP planning in ways that generic advisors miss. Two to three extra years of residency creates a late start that compounds into a meaningful wealth gap if it isn't addressed directly. Fee-for-service cash flow changes the retirement contribution strategy. Practice values at 7–10× EBITDA create a different kind of exit opportunity — and a different kind of DSO decision. And your disability insurance needs a clause most boilerplate policies don't include.

This guide covers the financial planning priorities specific to orthodontic practice owners.

The late-start problem

A general dentist who graduated at 22 and entered practice at 26 has been compounding assets for 4 years by the time you complete your orthodontic residency and see your first patient as an attending. That gap matters: $100,000 invested at age 27 at 7% annual return grows to approximately $1,069,000 by age 65. The same contribution at age 30 grows to $878,000. That $190,000 difference on a single year's missed contribution multiplies across a career — specialists who start 2–3 years later and earn the same calendar income as GPs arrive at retirement with less, unless they plan differently.

Tax strategy at orthodontist income levels

S-corp election

A sole proprietor or single-member LLC orthodontist pays self-employment tax on all net practice income — 15.3% on the first $184,500 of net earnings (2026 Social Security wage base³), then 2.9% on the rest. At $368,000 net income, that's approximately $29,000–$32,000 in self-employment tax before federal income taxes. An S-corp election shifts a portion of net income to pass-through distribution not subject to FICA, saving $10,000–$20,000+ annually for most orthodontic practice owners after accounting for payroll administration costs.

The optimal W-2 salary in an S-corp depends on what the IRS considers reasonable compensation for your role, the 25%-of-W-2 employer 401(k) formula, and the SS wage base. For most orthodontic practice owners, a W-2 in the $190,000–$240,000 range both satisfies reasonable-comp standards and maximizes employer 401(k) contributions. Use the S-corp tax savings calculator to model your specific numbers.

The §199A QBI deduction

Orthodontic practices are "specified service trades or businesses" (SSTBs) under IRC §199A because dentistry is classified as a health service. The OBBBA (signed July 2025) permanently extended the §199A deduction at a 23% rate and widened the phase-out ranges. At $368K net income on a joint return, you may qualify for a partial deduction — worth modeling with your CPA, since the SSTB phase-out at your income level determines whether any deduction survives. Retirement plan contributions described below reduce your taxable income and can preserve access to the deduction that would otherwise phase out entirely.

Retirement planning and the cash balance advantage

Solo 401(k) contributions in 2026 are capped at $72,000 per year ($80,000 with the age-50+ catch-up contribution, $83,250 with the SECURE 2.0 age-60–63 super catch-up).² For an orthodontist netting $400,000+, that leaves $320,000+ per year taxed at the 35–37% federal bracket. A cash balance plan layered on top changes this math substantially.

Orthodontic practices fit the cash balance plan profile well for two reasons:

• Stable, predictable income. Fee-for-service orthodontic revenue is more foreseeable than insurance-dependent GP revenue — once you have a functioning practice, monthly production variance is relatively low. Cash balance plans require a mandatory contribution range each year; stable income makes that feasible.
• High income means large deductions. The §415(b) annual benefit limit is $290,000 (2026, per IRS Notice 2025-67²). Contribution amounts are actuarially calculated to fund that limit by retirement. The closer you are to retirement, the higher the annual contribution allowed — which is exactly when orthodontists are in their peak earning years.

Ranges are illustrative. Your actuary certifies the exact contribution based on plan design and interest crediting rate. See the full cash balance plan guide for setup costs and who this fits.

Practice valuation: why orthodontics trades at a premium

Orthodontic practices sold in 2025–2026 achieve 7–10× EBITDA, or 75–90% of annual collections — significantly above general dentistry (3–6× EBITDA for individual buyers).⁴ The structural reasons:

• Recurring multi-year revenue. A comprehensive case generates $5,000–$8,500 over 18–30 months of treatment, creating predictable cash flow that buyers value more highly than the episodic, single-visit GP model.
• Minimal insurance dependency. Most orthodontic practices operate primarily fee-for-service or with limited in-network participation, removing the A/R risk and insurance reimbursement compression that suppresses GP values.
• High EBITDA margins. Well-run orthodontic practices carry EBITDA margins of 22–26% versus 15–20% for GPs, amplifying the multiple effect on practice value.

The primary valuation risk is referral network concentration. A practice where 60%+ of new patients arrive from 3–4 referring GP offices will be discounted by sophisticated buyers, who model what happens to case volume if those referral relationships change after the sale. Pre-sale planning 3–5 years out should focus on diversifying referral sources, building direct/social patient acquisition, or documenting multi-year referral stability with data.

DSO transactions in orthodontics

Orthodontic DSOs and private equity platforms have been among the most active dental M&A buyers. Most transactions involve:

• Cash at close: typically 70–90% of total deal value.
• Rollover equity: 10–30% retained as equity in the acquiring platform, converting to a second liquidity event at the platform's next recapitalization.
• Earnout: 12–36 months, tied to production or EBITDA maintenance post-sale.

The tax treatment: goodwill proceeds from an asset sale are taxed at 23.8% (20% LTCG + 3.8% NIIT); equipment recapture is taxed as ordinary income. IRC §1202 QSBS exclusion does not apply to dental health entities per §1202(e)(3). Rollover equity is typically deferred at close (§721 or §351 treatment), then taxed at the subsequent liquidity event.

Use the DSO vs. Stay Solo calculator to model the 5-year wealth comparison including investment growth on cash proceeds versus continued practice accumulation.

Disability insurance for orthodontists

Standard group LTD offered through a DSO employer or professional association covers roughly 60% of base salary, excludes production bonuses, and defines disability broadly. For an orthodontist earning $368K+ — income that depends on the precise manual skill of placing brackets, wires, and aligners — this is inadequate protection.

What you need: an individual own-occupation policy with a specialty-specific definition that protects your ability to practice orthodontics specifically. The critical test: if you injure your right hand and can no longer place orthodontic appliances precisely, but could work as a general dentist performing extractions and restorations, does the policy pay the benefit? The answer must be yes.

Important riders for orthodontists:

• Future purchase option (FPO). Locks in the right to increase coverage as your income grows, without new medical underwriting. Establish this early before any hand, wrist, or back issues develop.
• Residual/proportional disability. Pays a partial benefit if you can work reduced hours but cannot maintain full production. Relevant for orthodontists managing a hand injury or repetitive-stress condition.
• Business overhead expense (BOE). A separate policy (or rider) that covers fixed practice overhead — staff salaries, rent, equipment leases — during disability. Your personal disability benefit does not pay these.

See the disability insurance guide and coverage calculator for carrier comparison and benefit sizing.

Financial independence timeline

The three-lever model for orthodontists:

1. Maximize the tax shelter stack from year one. Open a solo 401(k) immediately upon practice ownership. Add a cash balance plan once net income exceeds $300K and you're past year 3 of ownership. This combination generates the largest legal tax deductions available to any US professional.
2. Build a practice worth selling, not just a high-income job. Diversify referral sources. Hire an associate as production allows — it frees your clinical time and increases the EBITDA that drives sale value. Track EBITDA margin quarterly.
3. Coordinate exit timing with IRMAA planning. A large practice sale creates two years of elevated IRMAA Medicare Part B surcharges — a married couple in the top IRMAA tier pays approximately $13,872/year in additional Medicare premiums. Installment sale structure and Roth conversion windows during any non-compete employment period post-DSO sale can reduce lifetime taxes materially.