Small Aircraft; Low Wing; 1 Eng; Fixed Gear
Flight Crew Private; Flight Crew Instrument
Flight Crew Last 90 Days 2; Flight Crew Total 1480; Flight Crew Type 557
Situational Awareness; Training / Qualification; Distraction; Confusion; Communication Breakdown
Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy; Flight Deck / Cabin / Aircraft Event Other / Unknown; Ground Incursion Runway
Air Traffic Control Issued New Clearance
Environment - Non Weather Related; Human Factors
I had not been flying much due to the COVID-19 pandemic.  I was out flying locally to get familiar again with the airplane (just needed to go out and practice).  Departed from ZZZ and flew out west over the lakes.  Then decided to go to ZZZ1 to practice some touch and goes.  In my mind; I was thinking about doing the Touch & Goes.  However; I actually did not say that after I got passed over from ZZZ Approach to ZZZ Tower.  So; in my head; I knew what I was planning on doing; but I allowed my mind to think about other things like the new injectors we had just installed; getting the gear down; looking for other traffic I was to follow; etc.  Then ZZZ Tower told me I was; 'Cleared to Land.'  To my mind; I just ticked off the box - 'have permission;' without carefully thinking about what he said.  He said 'Cleared to Land;' he did not say 'Cleared for the Touch and Go;' but my brain did not pick up on that.  I continued the approach; landed; continued the roll; advanced the throttle and then began to take off again.  I knew I had messed up when the controller asked; 'What are your intentions?'  That is when it sunk in; I had made a mental error and not told him I was planning on doing a Touch and Go.  I was thinking it; but I didn't say it.  I think the best thing I can do is try and make sure I am spending more time flying; so I stay more proficient and more tasks become 'automatic' so that I can focus more of my mind on carefully thinking about each phase of flight; and paying more attention to the phraseology with ATC.  I did apologize to the Controller; a couple times; and he was very nice about it; but pointed out that bad things can happen when they don't know what we pilots are planning on doing - which I completely agree with.
Pilot reported thinking they were cleared for a touch and go; but were given a clearance to land.