Washington statutes require that "you must be paid at the regular payday; you have no right to be paid before then."
So, since you quit on payday, the employer has to pay you by the NEXT payday. If you get paid every Friday, then it would be the following week. If paid bi-weekly or 'semi-monthly', your paycheck should be delivered at that payday.
Here is the statute:
"RCW 49.48.010
Payment of wages due to employee ceasing work to be at end of pay period -- Exceptions -- Authorized deductions or withholdings.
When any employee shall cease to work for an employer, whether by discharge or by voluntary withdrawal, the wages due him on account of his employment shall be paid to him at the end of the established pay period:
PROVIDED, HOWEVER, That this paragraph shall not apply when workers are engaged in an employment that normally involves working for several employers in the same industry interchangeably, and the several employers or some of them cooperate to establish a plan for the weekly payment of wages at a central place or
places and in accordance with a unified schedule of paydays providing for at least one payday each week; but this subsection shall not apply to any such plan until ten days after notice of their intention to set up such a plan shall have been given to the director of labor and industries by the employers who cooperate to establish the plan; and having once been established, no such plan can be abandoned except after notice of their intention to abandon such plan has been given to the director of labor and industries by the employers intending to abandon the plan: PROVIDED FURTHER, That the duty to pay an employee forthwith shall not apply if the labor-management agreement under which the employee has been employed provides otherwise.
It shall be unlawful for any employer to withhold or divert any portion of an employee's wages unless the deduction is:
(1) Required by state or federal law; or
(2) Specifically agreed upon orally or in writing by the employee and employer; or
(3) For medical, surgical or hospital care or service, pursuant to any rule or regulation: PROVIDED, HOWEVER, That the deduction is openly, clearly and in due course recorded in the employer's books and records.
Paragraph *three of this section shall not be construed to affect the right of any employer or former employer to sue upon or collect any debt owed to said employer or former employer by his employees or former employees."
Source:
http://search.leg.wa.gov/wslrcw/RCW 49 TITLE/RCW 49 . 48 CHAPTER/RCW 49 . 48 .010.htm