Working Two Fulltime Jobs w/o being found out

I’ve looked at previous posts asking this but they weren’t that in-depth and also were about taking on a side gig or another part-time job rather than having two permanent positions.

I’m considering what my options would be if I took on another fulltime job per /overemployed.

My current job doesn’t mention it in the contract, but I know they’d be pissed if they found out. I want to try and keep it a secret, but not sure if it’s possible.

Would taxes, health care or pension reveal to either company that I’m doubly employed?

Thanks.

Edit: one of the jobs is fully remote and one is hybrid.

11 comments
  1. Assuming you’re on a regular work visa. When it comes to renewing, one company is gonna wonder why you aren’t asking them to help with the process.

  2. I don’t do 2 jobs but In my case i need to fill my taxes and others one time a year (doing this for 10 years). Actually everybody I know do the same (the filled paper is later sent to the company as u can deduct stuff like insurance and others). So when the company ask for tax paper and deduction what u going to do? “Nah. I already filled it and sent it “ ?!?, “what are those other taxable income ?”
    But idk, sounds very risky .

    Btw one time i had to quit and the company gave me 6 months free , I get salary but I don’t need to work, I should use those 6 months to get another job. So my plan was get job asap and have 2 salaries (at least for 6 months), i got new job in one week and the same week I started they asked for that id pension number ( I think is pension number idk, the number we show when we change jobs ). That’s it, the other company automatically knew about it and my dreams was over . 😂
    All my other coworker had the 6 months paid vacation.

  3. > Would taxes, health care or pension reveal to either company that I’m doubly employed?

    You would have to reveal to at least one of them that you are doubly employed, or they will try to register you in shakai hoken/employee’s pension and there will (obviously) be fallout when they find out you can’T be enrolled.

    There will also be the confusion of who’s deducting your residence tax – and whichever one is deducting your residence tax will see your taxable income jump.

  4. If both need to provide you with health care then they need to work together to work out the payments.
    If your working hours are overlapping then it’s fraud.

  5. You’ll need to tell both jobs that you’ll do your own taxes. It’s the 確定申告 which you need to do every year before April. Most people leave it to their workplace to do it for them, but for dual work they’ll see you paying an amount far higher than what they’re paying you, which is the tip-off to an additional source of income.

    You’d need to tell your second job why you don’t need them to enroll you in health care or pension.

  6. Sounds quite risky. In /overemployed, most of the people are in the US. In your case, pension payments and taxes would probably get you caught pretty quickly IMO, putting you in a tough spot with both employers. Better to do freelancing on the side or try working as a contractor for job 2.

  7. Legally there is an issue with overtime. The 40 hours per week is not per company, it’s total, thus you’d be doing 40 hours of overtime per week, and I’m sure none of the company would be willing to pay for it.

    Healthcare would maybe become an issue since both company will try to enroll you, and there may be issue for one, since you can’t register twice.

    Legally it’s quite difficult for them to prevent you from having 2 jobs, but you’ll hit a wall with labour laws/healthcare

    Taxwise you just have to tell them you’ll do your kakuteishinkoku by yourself and don’t have to disclose it to them.

    Easiest way would be to be a contractor of one company, and an employee of the other?

  8. It doesn’t matter if it’s not in the contract you have to check the company policy because you can be fire if they find out
    Also check your visa situation . If you need a working permit you need the written permission of your current employer (or a contract where it specifically states you can work in other places)

  9. You certainly could, if you wanted to spend so much time working.

    As for notifying your job, you would not need to tell them you are working a 2nd full-time. If you wanted, you could tell them you have a little side part-time, but even that you wouldn’t need to do.

    As for annual taxes, you can either: 1) let your company do them, and they file all things only knowing about themselves as the employer. Then you go to the tax office 1-2 months later and update the filing yourself OR 2) tell your employer that you will do your own taxes as you have some special deductions and prefer to do it on your own. I doubt they need to know what deductions but if they pressed you could say you support a family member overseas or pay a family members overseas tuition and need to file it on your own.

    When the tax office updates your filing, seeing the increased income, they will tell you the extra resident tax you owe based on the new higher income. They print the coupon, you go pay it.

  10. You could ask the potential new employer if they could hire you on a non-fulltime basis (e.g., as a consultant or contractor). This would free them from pension and insurance responsibilities, and give you some additional freedom as a wage (instead of salary) earner. Your current employer may also have provisions to allow some amount of secondary employment (兼業) – if you can get a second income while remaining within the rules, it’s better for your peace of mind.

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