Congestion-flation is hitting the Big Apple.

The MTA’s controversial congestion pricing program has businesses passing on their toll costs to customers — even outside of the so-called “relief zone” in downtown Manhattan, industry leaders said Wednesday.

And how much tolls have increased prices in the city can be tough to pin down, experts said, because the added burden of congestion tolls don’t always appear as a surcharge on a bill.

Delivery trucks face tolls as high as $21.60 for each trip into the congestion zone below 60th Street — but small businesses like Lightning Express say all of their clients are paying the extra costs.

“It’s just easier to say you know what, if it’s in Manhattan, you get charged with congestion pricing,” said owner Joe Fitzpatrick.

“To say that congestio

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