Independent site, not affiliated with GSA, the Department of State or the Department of Defense. Rates are copied from their public files; see sources.
Dynamic Traveller

Illinois · FY2027 · October 1, 2026 to September 30, 2027

Illinois per diem rates

4 Illinois destinations have their own FY2027 per diem rates. The highest is Chicago at up to $238 a night. Every county not listed below gets the standard CONUS rate of $113 lodging and $68 M&IE.

4
Destinations with own rate
$238
Highest peak lodging
$119
Lowest listed lodging
1
With seasonal rates
Standard rate, rest of state
$113/night
All unlisted counties
Meals & incidentals
$68/day
Standard M&IE
Maximum per diem, one full day$181

Not sure which applies? Type a city, county or ZIP code into the trip calculator.

All Illinois destinations, FY2027

Lodging shows the range across seasons. Sort any column; values are GSA's FY2027 file.

DestinationLodgingM&IEMax/day
ChicagoCook / Lake
$148–$238
$92$330
East St. Louis / O'Fallon / Fairview HeightsSt. Clair
$156
$86$242
Oakbrook TerraceDuPage
$123
$80$203
Bolingbrook / Romeoville / LemontWill
$119
$74$193

Highest maximum daily rate

Illinois: peak lodging + M&IE per day, FY2027

Top 4 destinations; lodging in blue, M&IE in terracotta.

Lodging (peak month)M&IE
ChicagoLodging $238M&IE $92$330East St. LouisLodging $156M&IE $86$242Oakbrook TerraceLodging $123M&IE $80$203BolingbrookLodging $119M&IE $74$193
ChicagoLodging $238M&IE $92$330East St. LouisLodging $156M&IE $86$242Oakbrook TerraceLodging $123M&IE $80$203BolingbrookLodging $119M&IE $74$193
Source: GSA FY2027 per diem file.

Destinations listed in earlier years

These were non-standard areas in at least one GSA file since FY2015 but are not listed under that name in FY2027.

DestinationListedFY2027
O'Fallon / Fairview Heights / CollinsvilleBond / Calhoun / Clinton / Jersey / Macoupin / Madison / Monroe / St. ClairFY2015–FY2018Counties now in East St. Louis / O'Fallon / Fairview Heights
SpringfieldSangamonFY2015–FY2015Standard rate

Over time

Fiscal yearNon-standard areasStandard rate
FY20274$113 / $68
FY20264$110 / $68
FY20254$110 / $68
FY20244$107 / $59
FY20234$98 / $59
FY20224$96 / $59
FY20214$96 / $55
FY20204$96 / $55
FY20194$94 / $55
FY20184$93 / $51
FY20174$91 / $51
FY20164$89 / $51
FY20155$83 / $46

Questions

What is the per diem rate in Illinois if my city is not listed?
The standard CONUS rate: $113 a night for lodging and $68 a day for M&IE in FY2027. GSA's file says the standard rate "applies to all counties not specifically listed" and that "cities not listed may be located in a listed county", so check the county first.
When do the FY2028 Illinois rates start?
Federal per diem rates follow the federal fiscal year: FY2028 rates take effect on October 1, 2027. GSA usually publishes them in August or September.

Source: U.S. General Services Administration (GSA), per diem rates and per diem files. Not affiliated with GSA. All sources