In the past it was possible to get a transaction without a fee confirmed if the inputs and outputs had a high enough priority and followed some rules. As of 2017 is a "free" transaction still possible if you don't care about how fast it will be confirmed? Several hours or even a day or two would be acceptable.

2 Answers 2


The Bitcoin consensus rules do not require transactions to have a fee, so it's still theoretically possible for a free transaction to be confirm.

It is, however, unlikely that any miners today will confirm free transactions. You can test this by sending yourself a free transaction to see if it confirms (but be sure you use a quality wallet, such as Bitcoin Core, that has features for handling transactions that never confirm).

  • 2
    For the record: I created a free transaction that got confirmed in about an hour (maybe lucky?). The transaction was within the rules mentioned in the question.
    – tlo
    Jan 14, 2017 at 13:43
  • @tlo: how did you resolved/avoided the "error code: -26;error message: 66: insufficient priority"?
    – V-X
    Mar 10, 2017 at 22:39

Yes. It is possible. But what exactly do you want to achive? Either you want to minimize the fees or you want to delay transaction confirmation. Difference in details...

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