Does a DOGE transaction under 1,000 bytes still have to pay the full fee tier?

When you see “charged per kilobyte,” don’t assume it means “anything under 1,000 bytes is charged as 1,000 bytes.”

The Dogecoin Core fee recommendation document explains that, starting with version 1.14.5, fees are no longer rounded up in the old way, but are calculated based on a transaction’s actual size in bytes. For example, using a recommended rate of 0.01 DOGE per kilobyte, a 192-byte transaction would cost 0.00192 DOGE.

Here, bytes refer to the size of the transaction data, not how many $DOGE you send. Read “fee per kilobyte” and “the total fee for this transaction” as two separate things.

This document is marked as updated through version 1.14.6. Its example illustrates the calculation method; it is not a quote from any wallet or trading platform today. Before sending, check the fee and billing method shown by the service you use. Platform withdrawal fees also cannot simply be substituted into this formula. This article has not tested the arrival time of any specific transaction.
Source: https://github.com/dogecoin/dogecoin/blob/master/doc/fee-recommendation.md