A dip to 4.4% would reinforce the view that Australia's labour market remains tight relative to RBA projections, likely supporting the Australian dollar and front-end yields as traders weigh the inflation trade-off the central bank has flagged. A steady 4.5% with modest job gains would largely match the RBA's own path and should draw a more muted response. Given the ABS survey changes, markets may discount part of any surprise, which could limit follow-through in AUD unless the October release confirms the trend. Participation and hours worked will be worth watching alongside the headline rate for a read on underlying labour demand.---Earlier:Australia jobs preview: CBA sees 15,000 gain, unemployment steady at 4.5%Australia jobs preview: employment seen rebounding in August, jobless rate at 4.5%AUD is the biggest mover vs the USD at -1.02%. What next technically?---With July's jobless rate sitting a whisker under 4.5%, it would take only a modest improvement to print 4.4%, a result that would leave the RBA's labour market running tighter than it planned.Summary:The preview forecasts unemployment edging down to 4.4% in August on a 20,000 rise in employment, against consensus at 4.5%July's unrounded jobless rate sat just below 4.5%, making the outcome a close callLabour demand indicators point to no sharp near-term shift in conditionsThe RBA says supply-shock cost pressures worsen the jobs-inflation trade-off, and its August forecast had unemployment ending the year at 4.5%ABS survey modernisation adds uncertainty: July's sample was temporarily reduced and August's seasonal adjustment has changedThe release schedule returns to normal timing from September's data, due in OctoberNational Australia Bank expects Australia's unemployment rate to edge down to 4.4% in August, forecasting a 20,000 rise in employment in today's labour force report, although the bank describes the call as finely balanced. Market consensus has the jobless rate holding at 4.5%.The closeness of the call comes down to where the rate started. July's figure rounded to 4.5%, but the unrounded reading sat just below that level, so only a modest improvement would be needed for the published rate to tick lower. NAB said labour demand indicators do not suggest any sharp change in conditions in the near term, leaving the outcome hinging on relatively small moves in the underlying data.NAB's forecast is slightly more upbeat than some other previews. Commonwealth Bank has pencilled in a 15,000 gain with unemployment steady at 4.5%, as covered in our CBA jobs preview, while Westpac's August jobs preview noted expectations for employment to rebound with the jobless rate unchanged.The result matters for the Reserve Bank of Australia. NAB noted the central bank has been explicit that cost pressures stemming from the supply shock worsen the trade-off between supporting the labour market and containing inflation. The RBA's August Statement on Monetary Policy projected unemployment finishing the year at 4.5%, so a drop to 4.4% would leave the labour market running slightly tighter than the central bank anticipated, at a time when it is already focused on inflation risks.There is an added layer of uncertainty from the Australian Bureau of Statistics' modernisation of its Labour Force Survey. July's data was affected by a temporary cut to the survey sample, and changes to how supplementary questions are collected mean the seasonal adjustment approach is being altered for August. NAB said these factors add uncertainty at the margin, which argues for some caution in reading too much into a single month's move in either direction.Beyond this release, the survey schedule is set to return to normal, with September figures due in October on the usual timetable. That should give a cleaner read on whether any shift in the unemployment rate is genuine, and on how much room the RBA has to balance jobs against inflation. This article was written by Eamonn Sheridan at investinglive.com.