Calculate tax across marginal bracket layers instead of applying the top rate to all income.
Calculate approximate 2025 federal income tax for a single filer with $52,000 of taxable income using the bracket layers shown by the IRS. Marginal bracket layering: fill lower-rate layers before applying the next rate. Applying the 22% marginal rate to all $52,000 would overstate the tax and make the bracket look like a cliff. Layer 1 $11,925 x 10% = $1,192.50 The first layer of taxable income is taxed at 10%; it does not change just because total income reaches a higher bracket. Layer 2 ($48,475 - $11,925) x 12% = $36,550 x 12% = $4,386.00 Only the dollars inside…
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