What to charge to add tandem breaker to free a panel space
This is panel and service work, the highest-stakes tickets in the book, where coordination and code drive the price. Figure about 45 minutes on a Normal run, with roughly $30 of material at contractor cost before markup. At a $120/hour shop rate - the worked example we use across this site - the flat-rate math for "add tandem breaker to free a panel space" comes out like this:
| Easy | everything cooperates: good access, sound wiring, no surprises | $110 |
| Normal | the typical version of this job in an occupied home | $130 |
| Hard | poor access, aged or altered wiring, extra protection or staging | $160 |
Same math: hours x grade x your rate, plus material at 25% markup, rounded up to $5. Don't know your rate? Find it free in two minutes.
What makes this job Easy or Hard
Panel work grades on scope creep you can see coming. Easy is a healthy panel with space, copper feeders and a straightforward task like landing one breaker. Normal covers most replacements and corrections in sound equipment. Hard is where the real jobs live: full upgrades with utility coordination, mast and meter work, grounding electrode upgrades to current code, crowded or rusted enclosures, aluminum feeder terminations, and every circuit in the house getting re-landed and labeled. A 100-to-200 amp upgrade is a full day-plus with permits, inspection and a planned outage - price it like the project it is, not like a big breaker swap. Older panels bring brand-specific surprises; some are replace-on-sight. Anything involving the service entrance also involves the utility and the inspector, and their schedules are part of your cost. Never grade panel work down to win a bid; it is the one category where surprises are guaranteed.
Don't forget
At these numbers this is a small-ticket task: apply your minimum job charge (most one-van shops use $100-150) or bundle it with other work on the same visit - the drive and setup cost the same either way.
Permit territory: this category often requires a permit and inspection. Price the permit as its own line and count the scheduling time as real labor.
Permits and inspection are their own line - $150-400 in most jurisdictions plus your time to pull and meet. Utility coordination on service work is billable scheduling, not a favor.
Questions
Why is there a price range instead of one number?
Panel condition, code-required upgrades and utility coordination move these jobs between grades. The same nominal task in a clean modern panel and in a rusted, double-tapped one are very different days.
Do these prices include the permit?
No - permits and inspection fees vary by jurisdiction ($150-400 is common) and belong on their own line, plus the time to pull the permit and meet the inspector.
Related panels & service prices
- What to charge to add circuit breaker and connect existing home run - $115 Normal
- What to charge to replace 100a main breaker - $415 Normal
- What to charge to panel upgrade 100a to 200a (overhead service same location) - $3,075 Normal
- All 75 flat-rate task prices
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