Use Daegu's official transport tools for routes, stations and first/last services. For fares, use the current Daegu Metropolitan City bus page rather than an older cached fare page: it lists regular-bus adult fare at KRW 1,500 by card or KRW 1,700 cash, and express/direct bus adult fare at KRW 1,950 by card or KRW 2,200 cash.
The same current city page says transfers are available up to twice within 30 minutes after tapping off. Reboarding the same route is excluded; buses outside Daegu use a 60-minute transfer window. Use the same card to board and tap off, and note that one card receives transfer benefits for one person. A transfer from a regular bus to an express/direct service can charge the fare difference. T-money, Hanpay and Cashbee are listed as compatible cards.
For late travel, check the final subway and bus before leaving your arrival hub. Dongdaegu Station and Daegu Station are different rail hubs.
Some older official transport pages still expose historical-looking fare figures. When official pages disagree, prefer the current Daegu city bus page and recheck it before a price-sensitive trip.