Your credit score updates only when a material fact changes that would either improve, or reduce your credit score. Yes creditors submit your payment information every 30 days, but this does not update your score.
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You credit report updates every four weeks and it also updates each time there is a change to the report such as a payment being reported by a creditor. Creditors report different times through the month so theoretically it can update almost weekly or daily depending upon how much different creditors report.