6 Reasons Illinoisans Keep Crossing Into Missouri and Not Going Back

Illinois taxes a home at more than double the rate Missouri does.

That’s not the only gap between these two states.

St. Clair County and St. Louis County sit across one bridge from each other, and if you live near either one, you already know which side treats you better.

These are the reasons Illinoisans keep crossing into Missouri and not going back.

Note: This is general information, not legal or tax advice. Tax rates, licensing rules, and dollar amounts are subject to change.

1. Fireworks Illinois Won’t Sell

Illinois keeps a tight leash on what’s legal to light, a big reason buyers keep crossing.

Sparklers, glow worms, and the small stuff pass.

Firecrackers, bottle rockets, and roman candles don’t.

Missouri sells them.

The two states split sharply on the rules, according to KSDK’s comparison of fireworks laws on both sides of the river.

Stands open every summer under a state sales window that runs from June 20 through July 10, then again around New Year’s.

Fireworks tents pop up on the Missouri side within sight of the state line every year, timed to that same window.

Some Missouri counties add extra local limits on top of the state window, so it pays to check before buying.

If you want the loud stuff, you already know which side of the river to shop.

2. A Steeper Cannabis Tax

Illinois piles a hefty tax onto every legal cannabis sale.

A purchase carries a 10% excise tax under 35% THC, rising to 25% above that line, on top of ordinary sales tax.

Cross into Missouri, and your bill stops at a flat 6% state tax.

There’s no potency math.

Illinois’ cut rises further if a county or city adds a local cannabis tax on top, which many already do.

St. Louis Public Radio reported dispensary owners near the border expected Metro East shoppers to start crossing once Missouri’s stores opened.

The tax gap was the reason they gave.

3. Gas Prices at the Pump

Illinois’ gas tax ranks second-highest in the country, per the Tax Foundation’s July 2026 count of what every state charges at the pump.

The state’s combined gas taxes and fees run about 70 cents a gallon.

That’s steep.

Missouri charges about 30 cents a gallon, less than half of what Illinois collects.

Illinois adjusts its rate twice a year to keep pace with inflation, so the gap rarely narrows.

Gas stations lining Missouri’s side of the bridges see a steady run of Illinois plates whenever the prices spread that wide.

Fill up on the Missouri side, and your tank costs noticeably less on the spot.

4. A Steep Gap in Cigarette Taxes

Illinois charges a state excise tax of $2.98 on every pack of cigarettes.

Cross into Missouri, and you’ll pay 17 cents a pack instead.

The difference works out to $2.81 a pack, or more than $28 on a single carton.

That’s serious money.

Convenience stores just over the bridges keep cigarettes priced at Missouri’s lower tax.

Shoppers know exactly which stores those are.

A carton bought on the Missouri side costs a fraction of what it would back home.

5. A Bigger Property Tax Rate

Illinois taxes a home at a much steeper rate than Missouri does.

The state's effective property tax rate sits at 1.88% of a home's value, versus Missouri's 0.89%.

That's more than double.

Own a home in Illinois, and you'll feel the difference on every bill.

The Illinois Policy Institute, a policy research group, points to Census migration data showing the state lost close to 73,000 residents to Missouri on net between 2006 and 2015.

St. Clair and Madison counties, closest to the river, saw the biggest losses.

6. No FOID Card Required

Illinois requires a state-issued ID card just to hold a gun or a box of ammunition.

Even a hunter buying a single box of shotgun shells needs the card in hand at checkout.

The Firearm Owner's Identification Card, or FOID card, needs a background check and renews every 10 years, under Illinois' licensing law.

Rifles, shotguns, and handguns all fall under the same card, with no separate carve-out for hunting equipment.

No exceptions.

Missouri doesn't ask you for any of that paperwork.

The state dropped its permit requirement for concealed carry in 2017.

Walk into a Missouri gun shop, and you can leave the same day with a long gun or a box of ammunition, no card required.

That gap alone pulls many hunters across the bridge every hunting season.

Missouri's Toll-Free Highways

Missouri charges nothing to drive on any of its roads or bridges.

Zero tolls, statewide.

The state's last toll crossing, the Lake of the Ozarks Community Bridge, paid off its construction debt early and went toll-free on April 30, 2024.

Missouri hasn't charged a toll anywhere since.

The bridges linking St. Louis to the Illinois side, including the Poplar Street Bridge and the Stan Musial Veterans Memorial Bridge, cross free on both banks of the river.

Head north toward Chicago instead, and Illinois' toll booths start well before you ever reach the state line.

Illinois' Estate Tax

Illinois taxes what's left of an estate once it passes $4 million.

The number is exact.

A graduated rate above that line tops out at 16%.

Even the federal government only taxes estates above a far higher threshold, in both states.

Missouri has no estate tax to speak of.