Most Dynamic Banking examples start with a household that has a line of credit and money left over every month. This one had neither. Someone in Eugene reached out to me after both credit cards were already maxed out, with $783 coming in each month and $810.93 going out. That's $27.93 short every month before anything goes wrong. I went through it line by line in a breakdown of a Eugene budget running negative on credit cards alone.
Dynamic Banking doesn't create money. It takes the money you already have, points all of it at your debt, and uses the timing of your payments to cut the interest you're charged. With negative cash flow, which means more going out than coming in, there's very little to point anywhere. A plan built on a line of credit needs a real surplus, which is why negative cash flow is on the list in when chunking is the wrong move. But this budget still had something to work with.
There were two cards. One charged 20% interest. Its minimum payment was $149, and $84 of that went to interest, so only $65 actually paid down the balance. The other card had a 0% promotional rate with nine months left, so its $75 minimum went entirely to the balance.
Step one was sorting the bills into two piles. Some bills can only be paid with cash or a bank transfer: rent, the card payments themselves, a personal loan, and laundry. Everything else can go on a credit card, like renter's insurance, the phone, the internet, pet costs, and a stack of subscriptions. Not counting the 20% card's payment, the cash-only bills came to $460.10 a month. The card-friendly bills came to $201.83.
Step two was changing the order. On payday, set aside $460.10 for the cash-only bills. Send everything else, $322.90, to the 20% card right away, at the start of the month. After that month's interest, the balance drops by about $238.90. Then charge the $201.83 of card-friendly bills back onto that same card as they come due, as late in the month as you can.
Why does the order matter? A credit card charges interest on the average daily balance, which means the average of what you owed across every day of the billing cycle. Paying $322.90 on day one and letting the bills trickle back on over the month keeps that average lower than paying on the due date. And without cutting a single thing, the balance now falls by about $37 a month instead of growing.
Step three moved the internet bill and the renter's insurance to the 0% card. That card was getting paid down anyway, so charging $72.88 a month to it costs nothing in interest while the promotion lasts. It also means the 20% card now carries only $128.95 of bills a month, so its balance falls by about $110 a month. In the first month that saves somewhere between $1.83 and $4 of interest. That's not much.
Step four, cutting subscriptions, did the most good. A streaming service, paid cloud storage for a phone, a music subscription, a video subscription, a shopping membership, and one more subscription were adding up without anyone noticing, and free versions exist for most of them. The goal wasn't to cut every bit of fun. One $5.99 game stayed, because it kept this person entertained at home, and entertainment that cheap costs less than getting bored and spending money somewhere else.
After the cuts, the 20% card carries just $63.93 of bills a month, and its balance falls by about $175 a month. Each $175 knocks about $2.91 off the next month's interest, and those savings stack. The first month saves $2.91. The second saves $5.82. By month four, the card costs $11.64 a month less than it did at the start. By month nine, it costs about $26 a month less, and a card that was maxed out has real room on it again for an emergency.
Month nine is also when the 0% rate ends, so the plan gets redone then. Whichever card is charging the least at that point should carry the everyday bills, and whichever charges the most should get the payday payment. Can a 0% credit card do the job of a line of credit? covers what changes when a promotional rate runs out.
If your own budget runs short, start where this one did. Print last month's statements, mark every subscription with a highlighter, and cancel anything you haven't used in 30 days before you change anything else.