How are District of Columbia Mechanical Engineer salaries calculated on this page?

Nominal wages come from BLS Occupational Employment and Wage Statistics (OES) — annual employer surveys, May 2026 reference period. Real-wage figures use BEA Regional Price Parities (2023 vintage) to adjust for state-level cost of living. No self-report or jobs-board data is mixed in.

Why is the BEA RPP for District of Columbia different from a single CPI number?

BEA splits regional price parity into three components — goods, services, and rents — reweighted to the BEA's national consumption basket. District of Columbia's overall index of 110.7 reflects rents 168.1, services 109.0, and goods 106.5.

Where does District of Columbia rank for Mechanical Engineer pay?

On nominal BLS wages alone, District of Columbia ranks among the 51 states and DC by median pay. After the BEA cost-of-living adjustment the ordering changes — high-cost states fall, low-cost states rise. Both rankings are shown in the data table on this page.

Is District of Columbia a 'real-wage arbitrage' state for Mechanical Engineers?

No — District of Columbia's RPP of 110.7 sits above 100, meaning the $130,000 nominal wage compresses to a real-wage equivalent of $117,421. The cost premium goes mostly to rents and services.

What are the limits of these Mechanical Engineer salary numbers?

BLS OES is an employer survey of W-2 wages — it excludes contractor pay, bonuses outside the base wage definition, equity compensation, and tip income. Self-employed practitioners and gig workers are not represented. For occupations with significant non-W-2 income, the BLS figure is a floor, not a complete picture.

When does this data update?

BLS OES releases a new May reference set roughly each spring; we re-run the ETL pipeline within two weeks of release. BEA RPP refreshes annually. The last-synced timestamp at the top of this page reflects the most recent build.

Does PE license raise mechanical engineer pay in District of Columbia?

PE (Professional Engineer) license through District of Columbia's engineering board typically adds 5-15% to the BLS-reported median for mechanical engineers, concentrated in industries that require sealed drawings — civil-mechanical (HVAC for buildings), pressure-vessel, oil/gas, and government contracts. In R&D, defense (where security clearance dominates), and consumer-product design, PE has limited wage premium. District of Columbia follows the NCEES path: BS-ABET + FE exam + 4 years of progressive experience + PE exam.

District of Columbia Mechanical Engineer Salary: BLS $130K Median, Real $117K (2026)

TL;DR

District of Columbia pays Mechanical Engineers a BLS median of $130,000 — the more useful number is $117,421, what that paycheck buys after rent and services.
Real wage trails nominal by $12,579 after BEA adjustment — the cost-of-living bill, mostly rents.
Wage envelope: $82,760 (P10) to $191,880 (P90), with quartiles at $105,680 and $166,110.
Nominal: #2/51 · Real: #5/51 — ranking shifts by 3 positions after RPP.

Wage breakdown — District of Columbia

Percentile	Nominal (BLS)	Real (BEA RPP-adjusted)
P10 (entry tier)	$82,760	$74,752
P25 (lower quartile)	$105,680	$95,454
P50 (median)	$130,000	$117,421
P75 (upper quartile)	$166,110	$150,037
P90 (top tier)	$191,880	$173,313
Mean	$136,300	$123,111
Employment	590 Mechanical Engineers in District of Columbia

Cost of living — BEA Regional Price Parity

Component	District of Columbia index (US = 100)
All-items RPP	110.7
Goods	106.5
Services	109.0
Rents	168.1

District of Columbia is a high-cost state — RPP 110.7 above the national 100 baseline. Most of the cost premium routes through rents (168.1) and services (109.0).

After-tax take-home — District of Columbia (2024 BLS · 2024 tax year, single filer)

Layer-by-layer take-home math at the BLS median

Layer	Amount	Note
Gross BLS P50 (Mechanical Engineer)	$130,000	nominal median
Federal income tax	−$20,018	15.4% effective; std deduction $15,750 applied
State income tax	−$8,209	4–10.75% (graduated)
FICA (SS 6.2% + Medicare 1.45%)	−$9,945	SS capped at $183,600 wage base
Take-home (after-tax)	$91,828	70.6% of gross
Real take-home (RPP-adjusted)	$82,942	÷ (110.7 / 100) BEA cost-of-living

What the District of Columbia state-tax burden means for Mechanical Engineer take-home

District of Columbia carries one of the heavier state-tax loads in the country at this income tier (6.3% effective on the BLS median). Combined with federal and FICA, gross-to-take-home spread is 29.4%, leaving $91,828 pre-RPP and $82,942 after the 110.7 cost-of-living index — a $47,058 gap from the headline gross.

Computed from 2026 IRS federal brackets (Rev. Proc. 2025-32), 2026 state DOR brackets, and 2026 FICA rates. Single filer, standard deduction, no other adjustments. See methodology · tax for limitations (married filers, ITM/SALT itemizers, retirement deferrals, HSA, dependent credits, etc.).

National context

Across the United States, BLS reports a national median of $102,320 for Mechanical Engineers with mean pay of $110,080 and total employment of 286,760. District of Columbia sits at #2 on nominal pay and #5 on real (cost-adjusted) pay among the 51 states and DC. After cost adjustment, District of Columbia falls 3 positions — the cost premium eats into the headline wage.

Frequently asked questions

How are District of Columbia Mechanical Engineer salaries calculated on this page?: Nominal wages come from BLS Occupational Employment and Wage Statistics (OES) — annual employer surveys, May 2026 reference period. Real-wage figures use BEA Regional Price Parities (2023 vintage) to adjust for state-level cost of living. No self-report or jobs-board data is mixed in.
Why is the BEA RPP for District of Columbia different from a single CPI number?: BEA splits regional price parity into three components — goods, services, and rents — reweighted to the BEA's national consumption basket. District of Columbia's overall index of 110.7 reflects rents 168.1, services 109.0, and goods 106.5.
Where does District of Columbia rank for Mechanical Engineer pay?: On nominal BLS wages alone, District of Columbia ranks among the 51 states and DC by median pay. After the BEA cost-of-living adjustment the ordering changes — high-cost states fall, low-cost states rise. Both rankings are shown in the data table on this page.
Is District of Columbia a 'real-wage arbitrage' state for Mechanical Engineers?: No — District of Columbia's RPP of 110.7 sits above 100, meaning the $130,000 nominal wage compresses to a real-wage equivalent of $117,421. The cost premium goes mostly to rents and services.
What are the limits of these Mechanical Engineer salary numbers?: BLS OES is an employer survey of W-2 wages — it excludes contractor pay, bonuses outside the base wage definition, equity compensation, and tip income. Self-employed practitioners and gig workers are not represented. For occupations with significant non-W-2 income, the BLS figure is a floor, not a complete picture.
When does this data update?: BLS OES releases a new May reference set roughly each spring; we re-run the ETL pipeline within two weeks of release. BEA RPP refreshes annually. The last-synced timestamp at the top of this page reflects the most recent build.
Does PE license raise mechanical engineer pay in District of Columbia?: PE (Professional Engineer) license through District of Columbia's engineering board typically adds 5-15% to the BLS-reported median for mechanical engineers, concentrated in industries that require sealed drawings — civil-mechanical (HVAC for buildings), pressure-vessel, oil/gas, and government contracts. In R&D, defense (where security clearance dominates), and consumer-product design, PE has limited wage premium. District of Columbia follows the NCEES path: BS-ABET + FE exam + 4 years of progressive experience + PE exam.

Sources & methodology

U.S. Bureau of Labor Statistics — Occupational Employment and Wage Statistics (OES), SOC 17-2141, 2024 reference period.
U.S. Bureau of Economic Analysis — Regional Price Parities, 2023 vintage (all-items, goods, services, rents).
Real-wage figures = nominal BLS wage ÷ (state RPP / 100).
See the methodology page for full computation details and limitations.

By Marcus Liang · Founder & Editor · Last synced 2026-05-05.

Cross-comparison: see how District of Columbia Mechanical Engineer pay ranks against the other 254 state × occupation pages on the Real Wage Atlas → — four-way ranking by real wage, after-tax take-home, state-tax savings, and cost-of-living arbitrage.