https://pages.18f.gov/joining-18f/pay-grades/ explains some of the rate information in Government contracting work.
https://www.opm.gov/policy-data-oversight/pay-leave/salaries-wages/2016/general-schedule-gs-salary-calculator/ is a calculator that gives information on the location-based adjustments to base rates. For example, the GS-14 Step 10 rate for Boston-Worcester-Providence, MA-RI-NH-CT-ME is $142,021 whereas the base is $113,444
| Grade | Step | Base | New England |
|---|---|---|---|
| GS-13 | step 1 | $73,846 | $92,448 |
| GS-13 | step 10 | $96,004 | $120,187 |
| GS-14 | step 1 | $87,263 | $109,245 |
| GS-14 | step 10 | $113,444 | $142,021 |
| GS-15 | step 1 | $102,646 | $128,503 |
| GS-15 | step 10 | $133,444 | $160,300 |
