Above a certain income, tax planning changes character. The deductions and credits that shape an ordinary return phase out and disappear, additional taxes switch on, and the levers that remain are structural rather than incremental — how income is characterised, when it is recognized, and through what entity it flows.
Things phase out — and the phase-out is itself a tax
Many credits and some deductions reduce as income rises and vanish above a threshold. Each phase-out means that within a band of income, an additional dollar earned costs more than the headline bracket suggests, because it also removes part of a benefit.
These bands stack. It is entirely possible to face an effective marginal rate well above your nominal bracket within a specific income range, and to be unaware of it because no single line on the return shows it. Identifying where those bands sit relative to your income is the starting point of high-income planning.
Additional taxes that apply above thresholds
Beyond ordinary income tax, high earners encounter an additional Medicare tax on earned income above a threshold, and a separate surtax applied to net investment income above a similar threshold. The second is the one people are least prepared for, because it applies to investment income — interest, dividends, capital gains, passive rental income — rather than wages.
This gives investment income planning a sharper edge at higher incomes: the same gain realized in a year where you sit below the threshold rather than above it can carry a materially different total rate.
Charitable giving is where structure pays
For high earners who give substantially, how you give matters as much as how much.
- Giving appreciated assets held long-term rather than cash can avoid the embedded capital gain while still supporting a deduction based on value — this is usually the single most efficient way to give
- Bunching several years of intended giving into one year can lift you over the itemising threshold in that year, where annual giving would leave you taking the standard deduction every year
- A donor-advised fund allows the deduction to be taken in the year of funding while distributions to charities are made over subsequent years, which pairs naturally with bunching
- For those of qualifying age, giving directly from a retirement account can satisfy required distributions without the amount appearing in income at all
The last of these is particularly efficient because it keeps income off the return entirely rather than offsetting it with a deduction — which matters when other thresholds key off that income figure.
Entity and compensation structure
For business owners at higher incomes, how profit is extracted matters more than at lower ones. The mix of salary and distribution, whether income qualifies for available deductions on qualified business income, and whether the entity type still fits are all live questions that interact.
Some of these interact awkwardly: a change that reduces one tax can reduce eligibility for a deduction elsewhere. This is the point at which modeling several scenarios beats applying a rule of thumb, because the rules of thumb were written for simpler situations.
Multi-year thinking
High earners frequently have lumpy income — a bonus, a liquidity event, a strong year in a business, a property sale. Planning one year at a time treats each spike as unavoidable when the real question is how income is distributed across several years.
- Accelerating deductions into a spike year and deferring them out of a trough
- Timing a business sale or property disposal relative to other income
- Realizing capital gains in the lower-income years around a spike
- Sequencing retirement account withdrawals or conversions across multiple years
- Using loss carryforwards deliberately rather than as they happen to arise
South Carolina in the picture
The state layer is smaller than the federal one but not trivial at high incomes, and South Carolina’s treatment of certain income types differs from the federal treatment — long-term capital gains and retirement income among them. For someone relocating from a higher-tax state the difference can be significant, and for someone with income sourced across state lines the allocation question needs handling deliberately rather than assumed.
None of this is aggressive. It is arithmetic applied earlier than most people apply it.
About the author
Latoya Clark
Latoya Clark founded Elite Pro-Tax & Financial Services to give individuals and small business owners in the Upstate straightforward, year-round tax and bookkeeping support — not just a filing service that disappears in April.
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