N-400 Final-Stage Wait Jumps 21% in One Week, Capping a Seven-Week Rebound

The week-over-week jump of 6 days (+21%) was large enough to trigger an outlier flag with z = 2.15, computed against the prior 4-week trailing mean. That flag is the only anomaly in the data this week. The 34-day reading is the highest since the W16 peak of 38 days in mid-April. It is worth noting what this metric measures: the final-stage wait is the time from a case's last recorded status to approval, not the total duration from the original filing date. Total filing-to-approval timelines for N-400 run considerably longer.

The weekly sequence from W19 through W24 tells a consistent story: 13, 16, 22, 25, 28, 34 days. Each week's median has been higher than the one before, with the pace of increases running roughly 3 to 6 days per week over the last four weeks. The 8-week slope of -0.2 days per week and an R² of 0.00 would suggest a flat trend, but that reading is shaped by the W19 and W20 lows of 13 and 16 days, which pull the regression line toward zero even as the last six weeks have moved in a single direction. The regression here understates the directional story the raw sequence makes visible.

The spring 2026 plateau ran from W13 through W17 at a consistent 37 to 38 days. This week's 34-day reading sits 3 to 4 days below that level. If the recent pace of weekly increases continues, the median could approach that range within 2 to 3 weeks, though the forecast model cannot confirm a trajectory given its negligible R². The data brief does not surface a confirmed cause for either the May dip or the subsequent climb; possible explanations include shifts in which field offices scheduled interview waves or changes in oath-ceremony pacing, but the current data does not distinguish among them.

The stage-duration data (raw case-level percentiles from the 30-day window, a different dataset from the weekly approval median) gives a sense of pipeline depth. The largest group, 38.7% of the visible pipeline, sits at 'Case Is Still Being Processed By USCIS': across 310,780 cases, the median wait at that stage is 135 days, with the 25th percentile (p25) at 94 days and the 75th percentile (p75) at 173 days. The second-largest group, 22.1% of the pipeline, sits at 'Interview Was Scheduled': across 177,568 cases, the median is 50 days (p25: 37 days, p75: 74 days).

Further along in the process, 91,824 cases sit at 'Oath Ceremony Notice Was Mailed' with a median of 18 days (p25: 11 days, p75: 28 days), a relatively tight spread. Another 54,489 cases are at 'Oath Ceremony Will Be Scheduled' with a median of 29 days but a much wider spread (p25: 12 days, p75: 59 days), consistent with some field offices scheduling ceremonies quickly and others queuing them over several weeks. Readers tracking their own case through this stage should bear in mind that US citizenship is conferred at the oath ceremony itself, not at the point of interview approval.